We use essential cookies (authentication, your saved goals/stack) by default. With your permission we’ll also enable privacy-respecting analytics (Vercel Web Analytics, anonymous load-time metrics) and error-replay diagnostics (Sentry — DOM snapshots only when an error fires) so we can fix bugs faster. Learn more about cookies
Barley Grass (Hordeum vulgare)
The young leaves of the barley plant, dried or juiced into a chlorophyll- and nutrient-rich 'green' powder. It carries flavonoids (saponarin, lutonarin), antioxidant enzymes and vitamins, and a few small studies hint at antioxidant, lipid and glycemic effects — but the human evidence is sparse and most data are compositional, in-vitro or animal.
What the evidence says
Most Barley Grass studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.
Most evidence is from mixed-quality studies published 2002–2026 with a typical study size of 36 participants.
Based on 5 studies · 36 total participants
Confidence
Low confidenceBy outcome
Just one small, non-randomized 4-week study (n=36, T2DM) hints at reduced LDL oxidation; everything else is animal, in-vitro, or food-science data with no proven human clinical outcomes.
No trials currently enrolling · 1 completed on ClinicalTrials.gov
Registered trials show research momentum for Barley Grass, not proof of effect — a registration is a plan, and posted results are sponsor-reported, not peer-reviewed. They are never counted toward the evidence rating above.
Browse these trials on ClinicalTrials.govClinicalTrials.gov · as of Sep 2026
Barley grass is the young, leafy growth of Hordeum vulgare harvested before grain forms, consumed as juice powder or tablets in 'green superfood' blends.
Its bioactive profile is genuinely interesting on paper: flavone glycosides such as saponarin and lutonarin, the antioxidant enzyme superoxide dismutase, GABA, chlorophyll, polyphenols and a range of vitamins and minerals — which underpins antioxidant and metabolic-health marketing. The honest evidence picture is thin.
There is one small 4-week clinical study in 36 people with type 2 diabetes showing young barley leaf extract reduced markers of LDL oxidation and free-radical activity (more so when combined with vitamins C and E).
Beyond that single human study, the literature is dominated by compositional analyses, in-vitro antioxidant and cancer-cell assays, and animal models (e.g. an anti-obesity / lipid-profile study in high-fat-diet rats). No large randomized trials, no meta-analyses, and no confirmed effect on hard clinical endpoints.
So barley grass is best treated as a nutrient-dense green with early, mostly-preclinical metabolic signals rather than a proven supplement.
Contains saponarin, lutonarin, SOD and polyphenols with antioxidant activity in lab and animal models.
Small clinical and animal data suggest reduced LDL oxidation and improved lipid profiles.
How Barley Grass works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.
Use caution — choose a certified gluten-free product, as grain cross-contamination is possible.
Not specifically studied; use normal dietary amounts and prefer well-processed products over raw juice.
No clinically significant drug interactions are well documented; data are limited. This possible interaction has not been individually evaluated for this supplement; its likelihood and severity are unknown. If you take an anticoagulant or antiplatelet medicine, ask a pharmacist or prescriber before using this product. Do not stop or change prescribed medicines based on this notice.
Tip: Start with a low dose and increase gradually
The current evidence for Barley Grass is insufficient to assign an evidence score, based on 5 indexed studies. The young leaves of the barley plant, dried or juiced into a chlorophyll- and nutrient-rich 'green' powder. It carries flavonoids (saponarin, lutonarin), antioxidant enzymes and vitamins, and a few small studies hint at antioxidant, lipid and glycemic effects — but the human evidence is sparse and most data are compositional, in-vitro or animal. Representative study: PMID 11976562.
The commonly studied dose of Barley Grass is Commonly 3-15g of barley grass powder daily (one clinical trial used 15g of young barley leaf extract). Individual needs vary — start at the lower end of the range and adjust based on how you respond.
The best time to take Barley Grass is in the morning. It can be taken on an empty stomach. Often taken as a morning green drink; the one clinical trial used 15g/day of young barley leaf extract.
Barley Grass is generally safe at recommended doses, with a few precautions worth noting. Reported side effects are uncommon and include bloating, gas, or mild GI upset. Use caution if any of these apply to you: Barley or grass allergy; Celiac disease / gluten sensitivity (grass is harvested pre-grain but grain cross-contamination is possible).
Psyllium Husk
Likely helpsGel-forming soluble fiber that lowers LDL cholesterol, regulates blood sugar, and promotes digestive regularity.
Resistant Starch
Likely helpsBypasses small intestine digestion to feed colon bacteria that produce butyrate — supports blood sugar, gut integrity, and metabolic health.
Green Tea Extract
Likely helpsConcentrated catechins from green tea that support metabolism, fat oxidation, brain health, and antioxidant defense.
Artichoke Extract
Likely helpsCynarin and chlorogenic acid stimulate bile production, support liver function, and modestly lower cholesterol levels.
Explore: Best supplements for Vitality & LongevityBest supplements for Body Health
Reviewed by Dr. Baher Al Hakim · Last reviewed June 2026 · evidence from 6 studies · how we score · editorial policy
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.
Tap node to isolate • Pinch to zoom • Tap edge for research