SCIENCE

If you’re starving to death in the middle of wilderness, you could possibly eat grass.

YEET MAGAZINE

Sep 24, 2023 • 22 min read

Updated 1 hour ago

If you’re starving to death in the middle of wilderness, you could possibly eat grass.

The problem with eating grass is that humans aren’t specialized to digest them. Animals like cows have cultures of bacteria and stomach specifically evolved to digest and absorb the nutrients in grass.

Humans don’t. The process of absorbing the nutrients usually need the food to be regurgitated and rechewed, something humans can’t do.

So, you can eat them. Grasses are non toxic and they usually don’t have a smell, so if you’re starving I doubt you’ll have a problem eating them. Like I said however, humans can’t absorb the nutrients from grass. So eating grass will temporarily stave off the starvation, but it really won’t help you in the long run.

If you were really stuck in the wilderness and you have access to water, I’d suggest not to eat the grass. There are quite a few options that can help with your imminent death awaiting in the wild. Fruits are the first. Go around and find some fruits that are familiar to you. Don’t eat something you don’t know, it might be poisonous. Also, if you have access to water then I’m assuming it’s a river/lake or something similar. Learn to fish if there are any.

Eventually, if it comes down to it, I’d eat the grass.

What is your definition of ‘starving to death’. We are actually able to survive a month without food; only 3 days without water.

We are omnivores. We lost our ‘barrel’ torso when we learned to cook our food; both meat and vegetables. It takes huge digestion ‘factories’ to process grasses and other raw vegetation so we used to have big barrel torsos, similar to the Gorillas.

When we found fire and cooking our food we humans took a huge step up on the ladder of evolution. Cooking food allows more nutrients and calories than raw. So much so that we were able to have time to think, to create, to communicate and fornicate.

We are not able to get enough sustenance from grasses. Horses and cattle and sheep and goats and Llamas and other herbivores are set up with the digestion faculties to process grasses.

There is a way to survive by eating the apical buds of shrubs and trees. It is what the Indians did who were trying to stay ahead of the calvary. They could pluck and keep running. Very digestible and full of calories. A tablespoon of apical (terminal) buds has about the same caloric content as a large lettuce salad. The lettuce salad being mostly water and the apical buds being tight. All carbohydrates are 4 calories per gram. Straight across the board.

If you pluck a stem of grass, find the NEWEST stem of the bunch grass or the smallest of the shoots from regular grass. Suck on the sweet juice from the bottom of the blade or leaf of the grass. It isn’t easy to find stems with this juice but hey, if you aren’t on the phone or shopping or cooking dinner for the family, you got lots of time. I’d be looking for water, myself.

Karen Parson

Yes. Sadly people in war are eating just that. Research Yemen or Syria (and other poorer countries) and it is sadly the case for some people.

Eating grass will not provide the human body with all the necessary nutrients, but it is sufficient to survive and contains some important nutrients such as calcium, iron and vitamins. Unfortunately it is not easily digested by humans. Cows and other grass eating animals have a much higher acid content in their stomach which helps them digest.

On the other hand, flowers are a safer option and contain various nutrients depending on the flower itself, much … (more)
Related questions

Is it safe to cook grass and eat?
Why didn't humans evolve to eat grass? There is so much of it.
Why don't humans consume grass?
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Faisal Jim

Grass is non-toxic and edible. But, since it just been 3 days and we can go for more than three weeks without food (Mahatma Gandhi survived 21 days of no food), i rather wait and hope for the best. While drinking lots of water.

Trying to eat better, still a carnivore. Have added veggies.6y
First off, 3 days is not starvation. A human can go for forty days without food, depending on health and general body weight. As a matter of fact in many religions, people fast for 40 days and nights as a purification rite. Most doctors would tell you not to exceed 40 days without food, because it is around then that your body starts consuming itself in order to survive. Usually, 3 days is around the time when you “feel” like you’re starving, but you actually aren’t.

That being said, grass does not provide the nutrients necessary for humans to survive. It might stave off hunger pangs but does l… (more)

CEO at The Studio of Hope Corporation (2012–present)3y
YES! Grasses are loaded with vitamins and minerals, about 400 species are edible.

Wheat, Rye, Blue grass grow everywhere, in fact I watched an episode of naked and afraid the other day on Discovery and found myself yelling at the TV as the contestants were starving while both wheat grass and Bamboo were behind them in the shot!

You can buy canned bamboo shoot at the grocery store or find it in several Chinese recipes!

Bamboo is a meal and a great source of protein and calories, with sprouted grasses, you harvest the seeds on top and crush them in a bowl or pot, add hot water or boil (better witho… (more)
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Neal Downs

Former Flatbed Trucking5y
You don’t have the digestive enzymes to make it work. And will die of dysentary like the Oregon Trail.

Unless, you use grass as a loose term. As yes, corn and wheat are grass.
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Paul Jones
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It would probably do you more harm than good. Your digestive system isn’t designed to digest grass and it would probably require more calories to digest it than you could extract from it — resulting in a net loss of calories.
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Dan Bradbury
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Is there a food you wouldn't eat even if you were starving to death?
No. I’d be starving to death. People who are REALLY starving know just how starvation works. One of the “tricks” your body plays on you when you are LITERALLY starving to death is to shut down your higher mental functions and rev up your emotional impulses. This is why people who are LITERALLY starving are known to have eaten their own shit, other humans (including relatives), beloved pets, dirt, tree bark and rocks. Starvation does that. There’s LITERALLY no available food I wouldn’t eat if I were starving to death because —news flash!— my life would depend on it.
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Christian Winter
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Why didn't humans evolve to eat grass? There is so much of it.
Why didn't humans evolve to eat grass? There is so much of it.

Because the energy density of grass is terrible. To live off grass entirely you basically have to be eating all day. That’s essentially what cows do. If you waste that much time on eating, you will achieve pretty much nothing else.
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John Burgess
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A diplomat is one who is paid to dine for his country; I've done so globally.8y
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Can humans survive if instead of eating food they eat leaves?
Originally Answered: Can human survive if instead of food, leaves are eaten?
It depends on the kind of leaves, but generally no. Leaves alone will not provide adequate nutrition as they do not provide enough protein and lack the full array of vitamins one needs. They do provide some very useful vitamins and minerals, but not enough.

We eat some leaves quite regularly -- lettuce and cabbage, for instance. Tree leaves are more challenging as most contain too much tannin and indigestible cellulose. You'd need a different kind of digestive system to handle them, complete with microbial flora in the gut that humans just don't have.
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Donna Fernstrom
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Reptile keeper and breeder, wildlife observation and ecology hobbyist.6y
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Why can't humans eat grass or other plants like other animals?
Because humans do not have a digestive system adapted to process cellulose. It requires a much longer and larger digestive tract to house the specialized bacteria that do this. There are a few different strategies herbivores use to process plant matter - for example, rabbits pass everything through their digestive system twice. (They eat their own poo after the first pass - they don’t eat it on the second pass through). Ruminants have multiple chambers where grasses are processed in different ways, and a very different digestive pH from ours.

Humans evolved to be predatory omnivores - our diges… (more)
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Jan Soloven
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Is it possible to survive if we eat something a minute before we die from starvation?
Originally Answered: Is it possible to survive if we eat something a minute before die from starvation?
You never know when it’s 1 minute from starvation until after the fact. But in fact there is quite a bit of experiences with near-death starving individuals being nursed back to health. Among the largest block encountered was in the liberation of prisoners from POW camps in WW2. These walking skeletons responded quickly to nourishment but more importantly perhaps, they regained their optimism after being freed from the horrors of prison camps.

… (more)
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Lonely Cantonese Sith Lord
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Can humans eat dirt?
Yes, you can (but really should not).

Earth was often eaten as a last resort by people in a famine. In the past, starving people would dig up a type of white, chalky clay called kaolin, and eat it like bread.

It is nearly nutrition-free, but at least it stops the hunger pangs. Geophagia (i.e. the eating of dirt) also occurs naturally when animals (including humans) do not get enough minerals from their diet.

However, continuous consumption in large quantities would eventually clog your intestines, so that your belly would swell up, resulting in malnutrition and death.

Some (especially natural medi… (more)
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Azul González
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Craig Good
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If humans could eat grass would nobody starve?
Grass is actually very inefficient at converting sunshine into food. That’s why grazing cattle need giant expanses of it. If we were also grass eaters we’d never be able to feed our current population with the arable land available.
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Dan Bradbury
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Harlan Williams
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Have eaten in every state but 30. Or 40.1y
All kinds of yes and no responses to this question. One thing the yeses have yet to mention is that grass contains abrasive granules called phytoliths. Composed of silica, these abrasive particles wear away at the teeth. So while you could possibly survive for a short while by eating low-nutrition grass, the amount you'd have to eat will really damage your teeth.
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Aaron Jantzen
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What would happen if humanity suddenly gained the ability to eat grass?
Oh, but you can already. Some types of grass such as the grass on your lawn would need special preparation for instance being made into Chinese style grass jelly, but it can certainly be edible if prepared properly.

And wheatgrass is a popular ingredient in healthy green smoothies. Make no mistake, it is indeed genuine grass.

The fact is, all grains, including wheat, barley, corn and rice are all types of grass, so actually most of human food is grass. While we more often eat the seeds, the leaves of the plants are edible but contain a lot of indigestible cellulose. Cows have a more efficient di… (more)
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Beth Grant
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Is death by starvation painful?
I've been very sick for a long time (from a brain tumor) and have 2 points of view to offer. In one instance, after having my tonsils and adenoids out when I was 33, post-op, even drinking water felt like pure acid touching my throat so not only did I refuse to eat, but I also refused to drink AT ALL.. for 7 full days!! After 2 miserable attempts at drinking water, nothing else even came near my throat to swallow in that week except for blood as I also kept having huge bleeding episodes where I would end up choking on blood!! So, aside from the pain aspect, I also feared trying to swallow anyt… (more)
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Phil McClellan
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Can I survive on eating only trees, rocks and grass? What will happen to my body?
First, lets take rocks out of the question…. Rocks have nearly zero nutritional value. You can swallow small pebbles, but your body won’t know what to do with them, and will not be able to digest them—they will come out just as they went it. Rocks are a definite no.

If you can choose what parts of what trees and grass to eat (it’s fruit, roots, sap, seeds etc), and how to prepare and process it, you can put together a fairly healthy diet. (Vegans do it all the time).

If you are talking about eating only wood from the trees (not the fruit), and you have the ability to grind it up, you would live … (more)
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Donna Fernstrom
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If you lived in a field and you couldn't eat say proper food for two weeks, could you survive eating grass?
You would probably survive, but you would be better off not eating grass, as it’s indigestible for humans. However, if you are in a field, and not on a lawn, there will be many more plants there than just grass. If you know how to recognize what’s edible and what isn’t, you could gather some food for yourself. Especially if you can cook them, perhaps over a fire made with compressed/twisted grasses or herbivore dung. I assume you have water available, as you won’t last three days without that, and food would be the least of your worries.

Examples of edibles likely to be found in a field (some c… (more)
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Dieter Neth
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Howard Miller
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Could someone survive from eating leaves off a tree? If you were starving in the middle of the woods and couldn't find any other source of food, could you just start eating grass and leaves?
Yes you could if you know what you are doing. Otherwise you could get very sick and even die.

I'm not trying to be dramatic here. You are talking about foraging for food, or finding edible wild plants. There are lots of great books on the subject. Look for books that are related to your area. A book on edible plants in Canada won't help you in Greece.

But the best way to learn is to take a local course or seminar from a naturalist, a botanist, or a mycologist so they can show you “hands on”. I did that, and learned a great deal.
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Steven Haddock
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Why do you not eat grass?
Humans, and all living things, need glucose

Luckily, it’s readily available as a sugar in fruit (fructose) and plants like cane and beets (sucrose). Your liver has mechanisms to break those apart and turn them into glucose.

There’s also starch, found in wheat, corn, rice and lots of other grains. It’s just a bunch of glucose molecules tied together in a chain. Your digestive system can break those down into glucose too.

But grass doesn’t have any of those. It’s cellulose. Strangely, cellulose is also a chain of glucose molecules. It’s just put together differently from starch.

Here’s a starch mole… (more)
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Arnold Saenz
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First problem I see is that grass has little or no fat. In your question you used the word “survive” and you can’t survive without fat intake. In some survival books it is written that you can’t survive eating rabbit. Why? It is very lean and has so little fat that people won’t live long on a diet of just rabbit. Fat is a nutrient transporter. Another problem with just grass is it is unknown from your question if there are toxic substances in the grass and whether they are in sufficient quantities to cause health or digestive issues or bacterial problems causing serious gastric and digestive p… (more)
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Kara Krelove
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Can humans eat flowers and survive?
Can a human eat flowers and survive?

Sure. In fact, you’ve probably eaten flowers - or plant parts that are going to become flowers, at any rate - and not even known it. Have you ever eaten broccoli? Each of those little green balls is an un-opened flower-head; if you leave the plant alone and let it proceed with its life-cycle, instead of cutting it, the whole head of the broccoli plant turns into a mass of tiny yellow flowers that bees absolutely love.

Other commonly eaten blossoms/flowers are nasturtiums, roses, violets, and squash. I’m sure there are more.

Of course, some flowers are poisonou… (more)
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Do animals in the wild consume a lot of dirt when trying to eat?
Do animals in the wild consume a lot of dirt when trying to eat?

It depends on what kind of animal. For example, a browsing giraffe probably does not consume much more dirt than a bit of wind-blown dust:

Photo: Wikipedia

Elephants eat a great deal of grass, often pulling up whole tufts, roots and all:

Photo: Wikipedia

They then give it a vigorous shake, or knock it against their front foot, to shake off the soil. But obviously, they still end up eating quite a bit of dirt. I would imagine that it must be hard on their teeth, but probably also helps them to procure some minerals.

But let’s take a loo… (more)
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Shgdrn Mjh
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If someone was lost in the wilderness, how long could they survive by eating grass or other non-poisonous plants providing the water was adequate?
Yes.

It boils down to calorie math:

when calories metabolized exceed caloric intake, you are starving.
when calories metabolized do not exceed caloric intake, you are not starving.
Unless a person is living in a fruit filled Garden of Eden (mangoes bananas, oily palm hearts, coconuts), vegan calories are difficult to access without cooking. Many raw vegetables (carrots, cantaloupe) require a person's gut to burn more calories during digestion than are gained from the food.

But cooking vegetables (boiling or roasting) makes the few calories available much easier to digest.

Concievably, one could just… (more)
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Jason Turner
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Why can't we eat dirt if we're in the woods starving to death?
Why can't we eat dirt if we're in the woods starving to death?

You can. It’s just not going to do you but so much good nutrionally. Of course different dirt will have different nutritional values, but none of it is enough to survive on. Fifteen pounds of dirt, with nothing else in it, has six(6) calories. There is also the possibility of ingesting something that is actively harmful to you, specifically parasitic worms. I’d suggest boiling at the very least, if that’s an option. If you are in the woods there are likely much better options to sustain you than dirt, even if they aren’t things you … (more)
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Craig Good
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Can you survive just by eating grass and other healthy leaves?
Yes, you can survive eating only [whatever].

Just not long or very well. Especially on whatever kind of madness this diet represents. I assume by “healthy leaves” you mean “edible leaves”, because any other definition is going to be gibberish.

A human would sicken and die pretty quickly on this diet.
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Dan Bradbury
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Mark Harrison
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What would happen if you eat a leaf from a random plant/tree?
There are a range of possibilities, ranging from “ooh, that was nice, I’ll bake a cake with some of that” through to a painful death.

If you are genuinely so starving, and there is literally nothing else to eat but leaves, and you have no reference material to look up the leaf, then there’s a set of steps you can go through to minimise the risk of eating something poisonous, but they take a few hours. (start by touching it, if you don’t react / feel ill, try holding it for a few hours, if you don’t react / feel ill, try touching a tiny bit to your lips, if you don’t react / feel ill after a few… (more)
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Dan Tannehill
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Does a pig eat grass?

Yes, they do. Notice the foreground in the picture. It’s all dirt. When I first fenced off this area, it was as lush and green as the ground behind it. In about a week, all the grass had been eaten. Not only that, but the dirt had been repeatedly rooted up as the pigs looked for grubs, worms or roots to eat. All the time, the feeder on the left side of the picture was full of feed. The wood planks laying on the ground were placed to allow the pigs to have sure footing without sinking in mud whenever it rains.

This pen was an unharvested peanut patch. The same thing happened. In about a week, al… (more)
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Ruth Marie Hofmann
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Restless explorer of recipes, health foodie with a streak of common sense.Updated 5y
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If a human ate grass would it count as a vegetable?
A human can eat the plant part of grass, as it is edible and non-toxic, but since we cannot digest grass, humans would starve to death on such a diet. Ruminant animals, such as cows, goats, sheep, and deer, have a repetitive digestive process with multiple stomachs or extra cud chewing to extract the maximum, albeit meager, nutrients from wild green grasses. Humans cannot do this which is largely why we have evolved to a wide variety of food sources in an omnivore diet.

Technically we already eat the fruit of a wide amount of grains that belong in the grass family. These cover the cereal grains… (more)
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Edward Mahoney
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Could you, in a survival situation, add rocks to your soup or boiling water to add to the mineral content, or would you more likely poison yourself?
Minerals in rocks don’t usually dissolve in water. There would be no real value in adding rocks to your soup.

Before they had iron pots to cook in many North American Indians would boil water by dropping heated rocks into a birch bark bowl. It’s a slow way to heat your soup up, and you get no value from the rocks.

There are some minerals that could poison you, but they are rare. Mercury containing minerals in particular would be really dangerous.
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Beth Goldowitz
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Kyle Huang
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How long can I survive if I just eat trees and grass?
I will make two assumptions. First, you have as many trees(you can't eat trees so I'll assume you mean tree based foods) and as much grass as you need. Second, you can drink as much water as you need. With these assumptions, let's take a look. Grass and “trees” have glucose contained in them, allowing your body to produce enough energy to keep going. However, these foods are lacking a sufficient amount of fat and proteins and other essential nutrients. But, nonetheless you should be able to survive for a good period of time by just eating these foods. Although the lack of essential nutrients m… (more)
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James Henry
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If you were a hot dog, and you were starving to death, would you eat yourself?
I have so many questions about the question…

Am I a man-sized/shaped hot dog? Or am I suddenly a sentient being in a hot dog? Where’s my mouth? Is my consistency all hot dog? Or do I still have bones and muscles etc etc.

What happened that I am now a hot dog? Did some mad scientist invent a hot dog ray that turns people into hot dogs? Also, what kind of hot dogs? The really cheap kind you get for 49 cents a pack or something like Hebrew National which is kosher hot dogs? I mean, the nutritional content of the first would probably be next to nothing.

Also, since I’m a hot dog and made up of proces… (more)
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John Young
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Can we eat grass?
No, not the way I think you mean; but we could with some minor genetic modification.

Actually, we humans do eat a large number of plants that fall in the grass family (Gramineae), including cereal grains such as corn, rice, wheat, oats, and barley, and the odd plate of bamboo shoots. But for purposes of this question, I’ll assume we are talking about the blades that are so dear to little lambs and boys with a really bad case of the munchies.

It would be so convenient if we could eat grass, wouldn’t it? Teenagers would never have to go hungry again waiting for Mom to get home! Plus they wouldn’t … (more)
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Claire Jordan
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What would happen to humans if they just ate grass? Would their bodies be as strong as cattle?
Yes. The reason being, we would need huge stomachs, so we would have to be strong enough to carry them around. And we would have to eat either our vomit (like cows) or our droppings (like rabbits) in order to process it, because grass has to be digested twice and then fermented to get much good out of it.
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Matt Riggsby
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Is it safe to cook grass and eat?
Parts of it.

In fact, you probably eat parts of grass on a daily basis. Wheat, oats, barley, corn, and other grains are cereals, part of the broad family of grasses. More specifically, we eat the seeds of a variety of grass species as a staple food.

Now, it’s not great for us to eat the rest of a stalk of grass. Humans simply aren’t biologically equipped to digest all of that cellulose. Stalks of grass aren’t necessarily toxic as such, but they provide little nutrition. Eating a bit of grass likely won’t harm you, but eating large quantities of it, like eating large quantities of anything else y… (more)
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Jessica Bayes
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Nutritionist at Www.jessicabayesnutrition.com6y
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Could the world survive on a plant based diet?
As a clinical nutritionist, I can say with much certainty, that yes we can survive on a whole foods plant based diet. As long as it is balanced and varied people can thrive on just plants. Careful planning is require with all diets to avoid deficiencies - not just plant based diets. You can get more than enough protein, iron, zinc and other nutrients on a plant based diet plus you are avoiding all the harmful effects of saturated fats and natural hormones found in meat and dairy. B12 is the only real nutrient of concern. We only need a very tiny amount of this nutrient and taking a supplement … (more)
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Mike Jones
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Can humans survive by eating only soil (dirt)? If yes, how long can one live like this?
Nope, not for long. People across the globe eat (hopefully small amounts of) clay. My understanding is it's used to treat diarrhea, heartburn, and “upset stomach".

I'm from the state of Georgia. We have a lot of white clay called kaolin. That's the “kao" in Kaopectate. They've changed from their original formulation to pink bismuth; apparently clay + pectin wasn't sufficiently safe and effective for humans.

Kaolin mining does leave behind the most intense blue green ponds. I'm not sure there's any healthy about the clay or the water or the mining process, but the ponds sure are pretty.… (more)
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Steve Blanchard
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How long can you survive eating only grass, dirt, and water?
Water is good.

Grass and dirt are a problem. Grass is semi-digestible and will leave you gassy and hungry because humans digestive systems are not designed to eat grass. A ruminate like a cow has multiple stomachs to get the most nutritional value out of grass. Even for a ruminate grass is not nutrient rich.

I think you will starve because grass is lacking any significant amount of protein and no fat.

A human needs .36 grams of protein per pound. For a 200 pound man that is 72 grams or 2.5 ounces of protein a day.

The only grass I could find with caloric values is wheat grass. Per 8 gram serving t… (more)
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Andrew Midson-Slettbakk
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Catering Manager (2015–present)6y
Absolutely, now, you are not a rabbit or other herbivore so your system is not quite cut out to digest the grass very well so you might get the runs (more dehydration), lots of wind and not much goodness from the grass but if that is all there is to eat, I would be eating it. More importantly, I would be looking for the flowers from the grass to eat, much easier.
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Wayne Hilborn
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Youtube author of "Theory of everything mind"2y
No. There are many things in the wild you can eat. Roots, berries, leaves, stems… but also many poisons. You can get apps to identify with your phone or study
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Mark Crompton
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Self employed ish at Writer/editor/teacher (2015–present)2y
It depends which grass. Large parts of the world's population have diets consisting largely of grass. Rye, wheat, rice and wild rice are all classed as grasses.
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Ali Bukhari
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Manager at Www.available.pk (2016–present)6y
Obviously you can eat anything to survive.

In Islamic perspective to be more precise we are allowed to eat forbidden items to eat ONLY if its the matter of life and death. Whether its Grass, dead animal, or anything.
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Related questions
Is it safe to cook grass and eat?

Why didn't humans evolve to eat grass?

There is so much of it.

Why don't humans consume grass?

Can humans survive if instead of eating food they eat leaves?

Could someone survive from eating leaves off a tree?

If you were starving in the middle of the woods and couldn't find any other source of food, could you just start eating grass and leaves?

Can humans eat dirt?

If you were starving, could you survive by eating leather shoes?

Can I survive on eating only trees, rocks and grass? What will happen to my body?

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What disease can you get from eating dirt?

Can a human eat grass to avoid starving? If so, how long would it keep them alive?

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Related questions

Is it safe to cook grass and eat?

Why didn't humans evolve to eat grass? There is so much of it.

Why don't humans consume grass?

Can humans survive if instead of eating food they eat leaves?

Could someone survive from eating leaves off a tree?

If you were starving in the middle of the woods and couldn't find any other source of food, could you just start eating grass and leaves?

Can humans eat dirt?
If you were starving, could you survive by eating leather shoes?

Can I survive on eating only trees, rocks and grass? What will happen to my body?

What would happen if you eat a leaf from a random plant/tree?

What disease can you get from eating dirt?
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