Nutrition Facts Fruit and Vegetables Barley Grass Nutrition Facts and Health Benefits By Rachel MacPherson, BA, CPT Rachel MacPherson, BA, CPT Rachel MacPherson is a health writer, certified personal trainer, and exercise nutrition coach based in Montreal. Learn about our editorial process Updated on October 14, 2021 Medically reviewed Verywell Fit articles are reviewed by board-certified physicians and nutrition and exercise healthcare professionals. Medical Reviewers confirm the content is thorough and accurate, reflecting the latest evidence-based research. Content is reviewed before publication and upon substantial updates. Learn more. by Ayana Habtemariam, MSW, RDN, LDN Medically reviewed by Ayana Habtemariam, MSW, RDN, LDN Facebook Ayana Habtemariam, MSW, RDN, LDN, is a registered dietitian, nutrition therapist, certified intuitive eating counselor, and macro social worker. Learn about our Medical Review Board Print Verywell / Alexandra Shytsman Table of Contents View All Table of Contents Barley Grass Nutrition Facts Health Benefits Allergies Side Effects Varieties How to Prepare Barley grass is the young leaf of the barley plant (Hordeum vulgare). Sometimes referred to as "barley leaves" or "barley green," barley grass is rich in chlorophyll and antioxidants (such as lutonarin and saponarin), and also contains gamma-aminobutyric acid (GABA), ferulic acid, vitamins, and minerals. Barley grass is used as an ingredient at many juice bars. In addition, natural-food stores often sell bottled juice drinks containing barley grass juice. Some stores also sell kits that allow you to grow your own barley grass for juicing. In Japan, green juices made with ingredients like young barley grass juice are known as "aojiru," and are widely consumed to enhance health. Barley grass powder (a dehydrated form of barley grass extract), barley grass capsules, and barley grass tablets are sold in many natural-food stores and in stores specializing in dietary supplements. Barley Grass Nutrition Facts Three teaspoons of barley grass juice powder (5g) provide 20 calories, 2g of protein, 2g of carbohydrates, and 0g of fat. Barley juice is an excellent source of vitamin A, iron, and magnesium. The following nutritional data is from the USDA. Calories: 20Fat: 0gSodium:Carbohydrates: 2gFiber: 0gSugars: 1gProtein: 2gVitamin A: 950IUIron: 1.1mgMagnesium: 25mg Carbs Three teaspoons of barley grass juice powder contain 2 grams of carbs, none of which comes from fiber. There is about 1 gram of natural sugars in this serving size. Fats Barley grass juice powder is fat-free. Protein Barley grass juice powder has 2 grams of protein in a three-teaspoon serving. Vitamins and Minerals Barley grass juice powder is particularly high in vitamin A, with 20% of your daily recommended intake (based on a 2,000 calorie diet) in only 3 teaspoons. It is also a good source of riboflavin, potassium, iron, and magnesium. Calories Three teaspoons of barley grass juice powder (5g) provide 20 calories, half of which come from carbs and the other half from protein. Summary Barley grass juice powder is an excellent source of vitamin A and also provides riboflavin, potassium, iron, and magnesium. Barley grass juice powder contains carbs and protein but no fat, and is low in calories. Health Benefits So far, there is very little scientific support for any claims about the health effects of barley grass, but there are some potential health benefits. May Improve Cholesterol Barley grass contains hexacosanol, a compound that may improve cholesterol metabolism by decreasing cholesterol synthesis. A study published in Evidence-Based Complementary and Alternative Medicine in 2015 investigated the effects of a barley sprout extract on lipid metabolism in healthy adults. Participants received either a barley leaf extract (in capsule form) or a placebo daily for 12 weeks. At the study's end, there was no difference in clinical or laboratory findings (including total cholesterol and LDL cholesterol) in the barley grass group compared to the placebo group. May Help Balance Blood Sugar Research indicates that barley grass can help with blood sugar balance, likely due to insoluble fiber content. Insoluble fiber can help balance blood sugar by improving insulin sensitivity. More research is needed. May Soothe the Central Nervous System Barley grass contains the compounds GABA and glutamic acid. These may have a calming, soothing effect on the central nervous system, making it a beneficial food for aiding anxiety, relaxation, and sleep. May Have Anti-Inflammatory Effects Barley grass contains antioxidant enzymes that may help reduce inflammation. Chlorophyll also has anti-inflammatory and antioxidant properties and is present in barley grass. What Is the Anti-Inflammatory Diet? May Enhance Immunity Barley grass contains polysaccharide structures that may enhance immunity by stimulating the activity of immune cells called macrophages. Allergies If you have allergies to barley or other cereal grains, consult your doctor before consuming barley grass juice powder. Adverse Effects If you have celiac disease or a gluten sensitivity, avoid any barley grass product that isn't labeled gluten-free. Keep in mind that supplements haven't been tested for safety by the U.S. Food & Drug Administration and are largely unregulated. You can get tips on using supplements here. The high levels of certain vitamins and minerals such as potassium, vitamin K, and phosphorus may not be appropriate for people with certain conditions (such as those on dialysis) or who are taking medication (such as warfarin). Pregnant and breastfeeding women should avoid barley grass due to the lack of research on safety. Due to a lack of scientific research on the health effects of barley grass, little is known about the safety of consuming barley grass long term or in concentrated doses. Varieties Barley grass juice powder may come combined with other so-called superfoods or functional food supplements to add to water, juice, smoothies, or tea. You can also buy pre-juiced fresh barley grass or grow your own barley grass to juice. How to Prepare Barley grass juice powder can be added to water, juice, smoothies, tea, or food such as oatmeal, yogurt, or baked goods. Green Tea Benefits and Side Effects 7 Sources Verywell Fit uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. Zeng Y, Pu X, Yang J, et al. Preventive and therapeutic role of functional ingredients of barley grass for chronic diseases in human beings. Oxid Med Cell Longev. 2018;2018:3232080. doi:10.1155/2018/3232080 Sasaki, D., Sasaki, K., Kadowaki, Y. et al. Bifidogenic and butyrogenic effects of young barely leaf extract in an in vitro human colonic microbiota model. AMB Expr. 2019;9:182. doi:10.1186/s13568-019-0911-5 Barley grass juice powder, barley. FoodData Central. U.S. Department of Agriculture. Byun AR, Chun H, Lee J, Lee SW, Lee HS, Shim KW. Effects of a dietary supplement with barley sprout extract on blood cholesterol metabolism. Evid Based Complement Alternat Med. 2015;2015:473056. doi:10.1155/2015/473056 Takano A, Kamiya T, Tomozawa H, et al. Insoluble fiber in young barley leaf suppresses the increment of postprandial blood glucose level by increasing the digesta viscosity. Evid Based Complement Alternat Med. 2013;2013:137871. doi:10.1155/2013/137871 U.S. Food & Drug Administration. What You Need to Know about Dietary Supplements. Kalantar-Zadeh K, Tortorici AR, Chen JL, et al. Dietary restrictions in dialysis patients: is there anything left to eat?. Semin Dial. 2015;28(2):159-68. doi:10.1111/sdi.12348 Additional Reading Byun AR, Chun H, Lee J, Lee SW, Lee HS, Shim KW. Effects of a Dietary Supplement with Barley Sprout Extract on Blood Cholesterol Metabolism. Evid Based Complement Alternat Med. 2015;2015:473056. doi:10.1155/2015/473056 By Rachel MacPherson, BA, CPT Rachel MacPherson is a health writer, certified personal trainer, and exercise nutrition coach based in Montreal. 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