Avoid in individuals with a known allergy or hypersensitivity to wheatgrass. Most wheat allergies are due to the gluten found in the wheatberry. However, wheatgrass does not have any gluten because it is cut before the plant forms a grain (berry).

Some individuals have reported nausea, headaches, hives or swelling in the throat within minutes of drinking its juice. Hives and swollen throat are often signs of a serious allergic reaction and should be handled as an emergency. Anyone having these kinds of symptoms after ingesting wheatgrass may have even more severe reactions to it later.

Wheatgrass is generally considered safe. No serious side effects were found in several studies using wheatgrass juice daily for up to one month. There have been no other reports of adverse effects in the available literature. Because it is grown in soils or water and consumed raw, wheatgrass may be contaminated with bacteria, molds or other substances.

Some individuals have reported hives, nausea, or swelling in the throat within minutes of drinking its juice.

Because it is grown in soils or water and consumed raw, wheatgrass may be contaminated with bacteria, molds or other substances. Wheatgrass is not recommended in pregnant or breastfeeding women due to a lack of available scientific evidence.

For transfusion dependent beta thalassemia (blood disorder) or ulcerative colitis, 100 milliliters of wheatgrass juice daily has been found effective. Traditionally, 8-32 ounces of wheatgrass juice has been administered via enemas, rubber bulb syringes or colonics for colon cleansing.

There is no proven safe or effective dose for wheatgrass, and use in children is not recommended.

Insufficient available evidence.

Insufficient available evidence.