Now Double Strength Iron 36 mg Review
Iron is an essential mineral that plays central roles in energy production, immune system function, and neurological health. Iron is an essential component of hemoglobin, a molecule that transports oxygen to the cells of the body, and myoglobin, which binds oxygen used in muscle tissues. NOW uses Ferrochel Iron Bisglycinate, which has clinically demonstrated superior absorption and is well tolerated because it is gentle and non-constipating. The product is listed as Gentle and Non-Constipating, and Ferrochel and the Albion Gold Medallion designs are trademarks of Albion Laboratories, Inc. NOW Double Strength Iron has twice the iron (36 mg per capsule) as the regular strength product (18 mg per capsule). Each bottle contains 90 veg capsules with one capsule per serving, taken daily with a meal. Each capsule supplies 36 mg elemental iron from 180 mg ferrous bisglycinate, which is 200% of the daily value. Other ingredients are rice flour, hypromellose cellulose capsule, vegetable stearic acid and silicon dioxide. The product is not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients, though it is produced in a GMP facility that processes other allergen-containing ingredients. Certifications listed include Halal, Kosher (Triangle K), Non-GMO, Intertek GMP Supplement Certification, and Vegan. The product is also listed as made without dairy, made without eggs, made without nuts, made without soy, gluten free, and vegan/vegetarian. The product is made and quality tested in the USA with globally sourced ingredients, and the color is green with speckles, with natural color variations possible. Warnings state that this product is for adults only, and that accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under 6, so it should be kept out of reach of children. Store in a cool, dry place after opening. The company notes it is family owned since 1968. These statements have not been evaluated by the Food and Drug Administration.
Study, Trial or Testing Result Summary
MembersHuman studies
2 of these 39 human studies gave iron by drip, not by mouth.
Members see the full analysis, checked against their own meds and goals. Start My 7-Day Free Trial →
Review Totals and Summary
Members75,062 reviews
Biohacker Summary
MembersWhat our biohacker panel says
RAL Summary
MembersThe tier and why
More Details
MembersBody systems · Combine with · Possible side effects
Supplement Facts
Iron 36 mg
| Iron (elemental) (from 180 mg Ferrous Bisglycinate) (Ferrochel™) | 36 mg | 200% |
Other ingredients: Rice Flour, Hypromellose (cellulose capsule), Stearic Acid (vegetable source) and Silicon Dioxide.
Directions: Take 1 capsule daily with a meal. Do not exceed recommended dosage unless directed by a physician.
Label source: Swanson · Report a label change
Where to Buy
Now · iHerb · Walmart
More focus and memory products
MembersThe highest ranked for the same goal
Read more
Our articles on this subject
- Supplements for Focus and Mental ClarityArticle · Jun 16, 2026
- How to Build a Longevity Supplement Stack: An Evidence-First ReviewArticle · Sep 7, 2026
Graded October 28, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.

