What wheatgrass is and what the research shows
Wheatgrass is the young green shoot of the wheat plant, harvested before it forms a grain head. It contains chlorophyll, amino acids, vitamins, and minerals. People drink it as juice, powder mixed into water, or tablets, usually in small amounts—a typical shot is 1 to 2 ounces of fresh juice.
The research on wheatgrass is thin. Most studies are small, done in test tubes or animals, or both. A few human studies exist, but they test specific claims rather than wheatgrass as a whole. What the evidence actually supports is narrower than what marketing claims.
Wheatgrass contains compounds that have antioxidant activity in the lab. Whether drinking wheatgrass juice delivers enough of these compounds to your bloodstream to matter in your body is a different question—one the research has not clearly answered. The same applies to anti-inflammatory claims: the compounds are there, but the dose you get from a shot of juice is small.
Key Takeaways
- Wheatgrass juice contains chlorophyll and antioxidants, but human studies are limited and mostly test single claims rather than overall health effects.
- The most consistent finding is that wheatgrass may reduce nausea in some people, particularly those undergoing chemotherapy, though the evidence is not conclusive.
- Wheatgrass is generally safe for most people, but it can cause nausea, appetite loss, or constipation, and it may trigger reactions in people with wheat or grass allergies.
- Fresh juice is more potent than powder, but powder is cheaper, lasts longer, and is easier to store and use daily.
- A typical dose is 1 to 2 ounces of fresh juice or 3 to 5 grams of powder mixed into water, taken once daily.
What the evidence actually supports
The strongest evidence—still modest—is for nausea relief. A small study of people receiving chemotherapy found that wheatgrass juice reduced nausea compared to a placebo. Other small studies suggest it may help with nausea from other causes, though the number of people tested is low. If you are dealing with nausea and want to try it, the dose used in research was 30 milliliters (about 1 ounce) once daily.
Claims about wound healing, blood sugar control, and immune function appear in wheatgrass marketing, but human evidence is scarce or absent. Test-tube studies show the compounds can do these things in isolation, which is not the same as doing them in a living person. One small study found wheatgrass may reduce inflammation markers in people with ulcerative colitis, but a single small study is not enough to call it proven.
Chlorophyll itself—the green pigment wheatgrass is rich in—is often marketed as a detoxifier or blood purifier. Your liver and kidneys handle detoxification. Chlorophyll has not been shown to enhance that process in humans, despite the appeal of the idea.
Fresh juice versus powder: trade-offs
Fresh wheatgrass juice is more potent than powder because it has not been dried or processed. If you buy it fresh—from a juice bar, a health food store, or grow it yourself—you get the full range of enzymes and compounds intact. The downside is cost (a single shot can run $3 to $7), shelf life (it lasts days in the refrigerator), and the taste, which many people find grassy and unpleasant.
Powder is cheaper per serving, stays fresh for months in a cool, dry place, and mixes easily into water or smoothies. You lose some enzyme activity during drying, but the vitamins and minerals remain. A typical serving is 3 to 5 grams (about a teaspoon) mixed into 8 ounces of water. Powder also lets you control the dose more precisely than a juice shot.
If you are testing wheatgrass to see whether it helps with something specific—nausea, for example—start with powder for a month. It is cheaper and easier to stick with. If you see no change, you have not spent much. If you do see a change and want to try the fresh version, you can upgrade then.
How to use wheatgrass safely
Wheatgrass is generally safe, but it is not side-effect-free. Some people experience nausea, appetite loss, constipation, or a slight headache after taking it. These effects are usually mild and temporary. Start with a small dose—half an ounce of juice or 1 to 2 grams of powder—and increase gradually over a week or two if you tolerate it well.
Do not take wheatgrass if you have a wheat allergy or grass allergy. The plant itself is gluten-free (gluten is in the grain, not the shoot), but cross-contamination during growing or processing can happen. If you have celiac disease or non-celiac gluten sensitivity, buy from a source that tests for gluten or grow your own.
Wheatgrass may interact with certain medications, particularly blood thinners and diabetes medications. If you take either of these, mention wheatgrass to your doctor before starting. Pregnant and nursing people should check with their healthcare provider first, as safety data in these groups is limited.
Growing wheatgrass at home
Growing wheatgrass is cheap and straightforward if you want a steady supply. Buy organic wheat berries (the whole grain), soak them overnight, spread them on a tray with soil or a growing mat, mist daily, and harvest in 7 to 10 days when the shoots are 4 to 6 inches tall. A single tray yields enough juice for several days.
You will need a juicer to extract the juice from fresh wheatgrass—a regular blender does not work well because the fiber clogs it. A manual wheatgrass juicer (also called a hand press) costs $20 to $40 and works without electricity. Electric cold-press juicers are more expensive but faster and require less effort.
If you do not want to juice, you can blend the fresh shoots with water and strain through cheesecloth, though this is slower and the texture is grainier. Many people find the taste more palatable when wheatgrass juice is mixed with other juices—apple, lemon, or ginger juice all work.
Choosing a wheatgrass product
If you buy powder, look for organic certification and a source that tests for contaminants. Wheatgrass grows quickly and absorbs whatever is in the soil, so sourcing matters. Check the label for the amount of wheatgrass per serving (it should be clearly stated in grams) and whether anything else is added. Plain powder is best; avoid products with added sugars or artificial flavors.
For fresh juice, buy from a place with high turnover—a busy juice bar is better than a health food store shelf. Ask how old the juice is; ideally it was made that day. If you buy frozen wheatgrass juice, thaw it in the refrigerator and use it within a day of thawing.
Price varies widely. Powder ranges from $0.50 to $2 per serving depending on the brand and where you buy it. Fresh juice from a bar is $3 to $7 per shot. Growing your own costs roughly $0.25 to $0.50 per serving once you have the initial setup, making it the cheapest long-term option if you use it regularly.
Wheatgrass as part of a routine
If you decide to try wheatgrass, think of it as one small part of a larger approach to health, not a replacement for anything else. It is not a substitute for eating vegetables, exercising, sleeping, or managing stress. It is also not a substitute for medical treatment if you have a health condition.
A reasonable approach is to take it for 4 to 6 weeks and notice whether you feel any different. Keep a straightforward log if you are targeting something specific—energy, digestion, nausea, or skin. If you see no change after a month, it probably is not working for you, and stopping saves money. If you do notice something, you can decide whether the cost and effort are worth continuing.
Frequently Asked Questions
Does wheatgrass have gluten?
The wheatgrass shoot itself is gluten-free because gluten is in the grain kernel, not the young plant. However, cross-contamination can happen during growing or processing. If you have celiac disease or gluten sensitivity, buy from a source that tests for gluten or grow your own to be certain.
Can I take wheatgrass every day?
Yes, daily use is safe for most people at typical doses (1 to 2 ounces of juice or 3 to 5 grams of powder). Some people take it daily for months without problems. If you experience nausea or other side effects, reduce the dose or take it every other day instead.
Will wheatgrass give me energy?
Wheatgrass is sometimes marketed as an energy booster, but the evidence does not support this claim. It contains B vitamins and minerals that support energy metabolism, but so do many foods. If you feel more energetic after taking it, it may be a placebo effect, which is real but not specific to wheatgrass.
How long does it take to see results?
If wheatgrass is going to help you, you may notice something within a few days to a week, particularly if you are testing it for nausea. For other claimed benefits, give it 4 to 6 weeks. If nothing changes by then, it is unlikely to work for you.
Can I mix wheatgrass powder with food instead of water?
Yes. Powder mixes into smoothies, yogurt, applesauce, or soup without losing its nutritional content. Mixing it with something flavorful makes it easier to take if you dislike the taste of plain wheatgrass water. Avoid mixing it into very hot liquids, as heat can degrade some of the enzymes.