Strictly speaking we eat a lot of grass, but in the form of grain: Wheat, rice, rye, barley, millet, sprouts et cetera. What most folks want to know is can you eat the culms and blades (stems and leaves.) What you just read — culms and blades — is one of the impediments to learning about grasses; it has an argot all its own, a specific vocabulary worse than mushrooms. More so, often with grass key identifying characteristics can only be seen with a microscope. In fact I attended a grass seminar a few months ago in which the lecturing professor said if you want guaranteed employment become a grass taxonomist. He said they are very rare and very well paid. As for humans eating grass, we are not multi-gastric (or in theory large-gutted). We aren’t designed to break down the cellulose in grass to get out the nutriments. Cows have a four-chambered stomach for that purpose, horses have a huge large intestine, even the gorilla has a gut that can accommodate large amounts of vegetation. Humans don’t. However, what we can do is dry the grass, grind it into a powder and use it as a bulking agent in food, such as breads, soups and stews. We don’t get much nutrition from grass prepared that way but it does add to the sensation of satiety and reduces hunger. But there are even issues with that, such as how often. There is the problem of cyanide. I have read and been told by those with Ph.D. after their name that all North American grasses are non-toxic. Many imported grasses, however, do have cyanide in some kind of chemical bond such as with hydrogen or sugar that gets separated on digestion. At the most basic level that means one has to know if the grass is native or not which also requires identification, and I’ve already mentioned grasses are a pain in the .. ah.. grass to identify. And while “natives” might not be toxic there are many grasses that seem to have very little edible value. The Andropogons come to mind which don’t seem to have any use beyond making crude brooms. As for common toxic non-natives Johnson Grass, a sorghum, is a good bad example. The large blades can be full of cyanide, depending upon the weather.
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Hope this helps! :P I don't eat grass lol
