NOW Foods supplements, graded by the human studies
We graded 43 NOW Foods products against the human studies of their ingredients, the dose on each label and what buyers say in their reviews. Each grade belongs to the product and the goal it was graded for: we do not grade how NOW Foods makes, tests or sells its products, and we sell no supplements. Educational, not medical advice.
Products graded
43
Goals graded for
28
Top-ranked for their goal
Tier 2, Researched
Tier 3, Reviewed
Tier 4, Emerging
Tier 5, Not Endorsed
The NOW Foods products we graded
Members43 products, A to Z
graded for Mood · 5-HTP (5-hydroxytryptophan) (from Griffonia simplicifolia Extract) (Seed) 100 mg per serving · reviews positive · a month
graded for Focus and Memory · Alpha GPC (L-alpha-glycerylphosphorylcholine) 300 mg per serving · reviews positive · a month
graded for Kidney Health · Astragalus Root Extract (Astragalus membranaceous) (Standardized to min. 70% Polysaccharides) 500 mg per serving · reviews positive · a month
graded for Eye Health · Vitamin A (100% as Beta-Carotene) 3000 mcg per serving · reviews positive · a month
graded for Hair Growth · Biotin 55000 16,667% per serving · reviews positive · a month
graded for Bone Health · Calcium (from Calcium Citrate) 600 46% per serving · reviews positive · a month
graded for Digestion and Bloating · Calories 5 kcal per serving · reviews positive · a month
graded for Blood Sugar · Chromium (from 1,835 mcg Chromium Picolinate) 200 mcg per serving · reviews positive · a month
graded for Immune Health · Copper (elemental) (from 30 mg Copper Bisglycinate)(Albion™) 3 mg per serving · reviews positive · a month
graded for Kidney Health · Calories 10 per serving · reviews positive · a month
graded for Weight and Metabolism for Men · Green Tea Extract (Camellia sinensis) (Leaf)(Standardized Extract) [min. 80% Total Catechins and 50% EGCg (Epigallocatechin Gallate) (200 mg)] (up to 4 mg of naturally occurring caffeine) 400 mg per serving · reviews positive · a month
graded for Muscle and Strength · Calories 100 kcal per serving · reviews positive · a month
graded for Weight Management · Glucomannan (from Konjac Root) (Amorphophallus konjac) 1.725 g per serving · reviews positive · a month
graded for Liver Health · Milk Thistle Extract (Silybum marianum) (Fruit/Seeds) (Standardized to 80 mg Silymarin Flavonoids - equivalent 80%) 100 mg per serving · a month
graded for Joints and Mobility · Hydrolyzed Collagen (Bovine) (BSE-free) 10 g per serving · reviews positive · a month
graded for Sexual Health for Men · L-Arginine (from L-Arginine HCl) 1 g per serving · reviews positive · a month
graded for Circulation · L-Citrulline 1.5 g per serving · a month
graded for Libido for Men · Maca (Lepidium meyenii) (Root) 500 mg per serving · reviews positive · a month
graded for Bone Health · Magnesium (From Magnesium Citrate) 400 mg per serving · reviews positive · a month
graded for Sleep · Magnesium (elemental) (from Magnesium Bisglycinate) (Albion) 200 mg per serving · reviews positive · a month
graded for Joints and Mobility · MSM (Methylsulfonylmethane) 22000 † per serving · reviews positive · a month
graded for Lungs and Breathing · Selenium (from L-Selenomethionine) 25 mcg per serving · reviews positive · a month
graded for Libido for Women · Tribulus terrestris (Standardized Extract) (min. 45% Saponins) (Fruit/Aerial Parts) 500 mg per serving · reviews positive · a month
graded for Cholesterol · Fish Oil Concentrate 2000 mg per serving · reviews positive · a month
graded for Regularity: Long-Term Relief · Calories 5 kcal per serving · reviews positive · a month
graded for Weight and Metabolism for Women · Phase 2® Starch Neutralizer (White Kidney Bean Extract) (Phaseolus vulgaris) · reviews positive · a month
graded for Blood Pressure · Potassium (from 310 mg Potassium Citrate) 99 mg per serving · reviews positive · a month
graded for Blood Pressure · Potassium (elemental) (from 1,400 mg Potassium Citrate) 448 mg per serving · reviews positive · a month
graded for Regularity: Long-Term Relief · Psyllium Husk Powder (Husk/Seed) 1.5 g (1,500 mg) per serving · reviews positive · a month
graded for Regularity: Long-Term Relief · Psyllium Husk Powder (Plantago ovata) (Seed) 9 g per serving · reviews positive · a month
graded for Hormone Balance for Men · Calories 20 per serving · reviews positive · a month
graded for Cholesterol · Calcium (from Calcium Carbonate) 150 mg per serving · reviews positive · a month
graded for Stress and Calm · Relora® (Proprietary blend of Magnolia officinalis bark extract and Phellodendron amurense bark extract) 300 mg per serving · reviews positive · a month
graded for Mood · Rhodiola Extract (Rhodiola rosea) (Root) (Standardized to min. 3% Total Rosavins and min. 1% Salidrosides) 500 mg per serving · reviews positive · a month
graded for Thyroid Health · Selenium (elemental) (from 40 mg L-Selenomethionine) 200 mcg per serving · reviews positive · a month
graded for Joints and Mobility · Serrapeptase (60,000 Serratiopeptidase Units) 27 mg per serving · reviews positive · a month
graded for Digestion and Bloating · Lipase 2960 USP Units per serving · reviews positive · a month
graded for Blood Pressure · Taurine (Free-Form) 1 g (1,000 mg) per serving · reviews positive · a month
graded for Hormone Balance for Men · Calcium (from Calcium Carbonate) 130 mg per serving · reviews positive · a month
graded for Joints and Mobility · UC-II® Standardized Chicken Cartilage (Providing 10 mg Total Collagen, including Undenatured Type II Collagen) 40 mg per serving · reviews positive · a month
graded for Sleep · Total Carbohydrate 1 g per serving · reviews positive · a month
graded for Healthy Aging · Zinc (elemental) (from 403 mg Zinc Gluconate) 50 mg per serving · reviews positive · a month
Members see each product's tier, its reviews and why. Start My 7-Day Free Trial →
What NOW Foods products were graded for
Each goal links to its page, with every product graded for it
Read more
Our articles on these goals
- Best Diet for High Cholesterol: What to Eat, What to Cut, and What the Trials ShowArticle · Sep 13, 2026
- How to Lower Diastolic Blood Pressure for LongevityArticle · Sep 17, 2026
- How to Lower Blood Sugar Naturally: A Comprehensive GuideArticle · Sep 9, 2026
Questions people ask
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Is NOW Foods a good brand?
Answer for members.
Which NOW Foods products have the strongest evidence?
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How does Reverse Age Lab grade NOW Foods products?
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Can I take NOW Foods supplements with my meds?
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Educational, not medical advice. Grades come from human studies on PubMed, the dose on each label, store reviews we read ourselves and our biohacker panel, and are updated as new studies arrive. NOW Foods is a trademark of its owner; Reverse Age Lab is not affiliated with it and sells no supplements. How we grade →