Barley grass powder
What it is
Young barley shoots harvested before grain formation, concentrated into a powder rich in chlorophyll, vitamin K, vitamin C, iron, calcium, and antioxidant enzymes (SOD, catalase). Small Japanese and Korean trials suggest antioxidant and mild blood sugar-stabilising effects. However, most trials are small (N<50), short-term, and at doses providing marginal nutrient contributions. Evidence is significantly weaker than comparably positioned supplements. Processing method critically affects quality — freeze-drying or low-temperature air-drying preserves more enzyme activity than high-heat processing. High vitamin K content: warfarin users must keep intake consistent. Gluten-free if harvested before grain formation, but manufacturing cross-contamination is common.
Dose
2–10 g/day of freeze-dried or cold-processed barley grass powder; higher doses needed for meaningful nutrient contributions
Time of day & tips
Source freeze-dried or cold-processed products — high-heat processing degrades enzymes and chlorophyll. If coeliac or gluten-sensitive, look for certified gluten-free versions — cross-contamination risk is real. Vitamin K content is significant — keep dose consistent if on warfarin. Not a replacement for vegetables.
Cycling
Safe for continuous daily use. Not a replacement for whole vegetable servings. No cycling needed.
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