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Barley grass

Supplement greens general nutrition
Aka: barley green, Hordeum vulgare grass
Brands seen in Singapore: Swanson Vitamins, Green Foods, Organic Traditions, Micro Ingredients, Nutricost
Not medical advice. Check with your doctor or pharmacist before you start, stop or change the timing of anything you take.
How to use
What it’s for
A greens powder — human trials are few and small
When to take
Timing untested
Studied for
Trials dosed daily for 4-12 weeks
Pros & cons
Pros
  • Carries fibre, minerals and vitamins from the leaf
  • One 12-week placebo-controlled trial in volunteers
  • Not listed in HSA's prohibited/restricted annexes
Cons
  • That trial found no lipid-lowering effect
  • Human trials are small and short
  • No standard dose — trials used 15 g or one capsule
Sources
  1. Evidence-Based Complementary and Alternative Medicine 2015 — Effects of a Dietary Supplement with Barley Sprout Extract on Blood Cholesterol Metabolism (randomised, placebo-controlled, n=51, 12 weeks) · read 2026-08-27
    what it says
    “Subjects were randomly divided into two groups: one group consumed a single capsule of barley leaf extract daily … for 12 weeks … Our study failed to show significant lipid-lowering effects of barley sprout extract”
  2. Diabetes & Metabolism 2002 — Effects of young barley leaf extract and antioxidative vitamins on LDL oxidation and free radical scavenging activities in type 2 diabetes (n=36, 4 weeks) · read 2026-08-27
    what it says
    “The subjects received one of the following supplements daily for 4 weeks: 15 g BL, 200 mg vitamin C and 200 mg vitamin E (CE), or BL plus CE (BL + CE).”
  3. Oxidative Medicine and Cellular Longevity 2018 — Preventive and Therapeutic Role of Functional Ingredients of Barley Grass for Chronic Diseases in Human Beings (composition review) · read 2026-08-27
    what it says
    “Barley grass is rich in functional ingredients, such as gamma-aminobutyric acid (GABA), flavonoids, saponarin, lutonarin, superoxide dismutase (SOD), K, Ca, Se, tryptophan, chlorophyll, vitamins (A, B1, C, and E), dietary fiber, polysaccharide”
  4. HSA Singapore — Guidelines on Prohibited and Restricted Ingredients in HS and TM, GL-CHPB-1-012 Rev. No. 001 (Oct 2025), Annex A (118 rows, Abrus to Zinc) and Annex B — both searched, no row for this ingredient · read 2026-08-27
    what it says
    “A list of specific prohibited and restricted ingredients is provided in Annex A … This list is not exhaustive. Dealers are responsible to ensure that their products are safe and appropriate for the target consumers.”
  5. iHerb Singapore — Barley Grass category, default (best-selling) order · read 2026-08-27
    what it says
    “1 - 19 of 19 results … Swanson Vitamins, Barley Grass Juice Powder … Green Foods, Green Magma®, Barley Grass Juice Powder … Organic Traditions, Superfoods, Barley Grass Juice Powder … Micro Ingredients, Moringa … Nutricost, Organic Barley Grass Juice Powder”
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Updated 2026-08-29. Every line above traces to a numbered source. Kozen-X is not a medical device and does not give medical advice. It lists what published sources have written down — nothing more. A pair not listed is unrecorded, not cleared. Before you start, stop or re-time anything, talk to your doctor or pharmacist.