Wheatgrass is the young grass of the wheat plant. People drink it as a shot of fresh juice or take it as a dried powder mixed with water. The juice and powder deliver vitamins A, C, and E, iron, magnesium, and chlorophyll.
Many use it to boost energy, aid digestion, and support the immune system. A standard serving is 1 ounce of fresh juice or 3 to 5 grams of powder stirred into water, often on an empty stomach for best absorption.
Wheatgrass can cause nausea or stomach upset in some people. It is high in vitamin K, so those taking warfarin or other blood thinners should be cautious. The grass itself contains no gluten, but cross-contamination with wheat grain during harvest is possible. People with celiac disease should choose certified gluten-free products.