NOW Foods Iron 18 mg Review
#7 of 9 · Best Low-Dose / Maintenance✓ Label verified · Supplement Facts read Sep 7, 2026Real retailer photo, cut out. Label unedited.
Consider it. Gentle maintenance dosing, not repletion. 18 mg of Ferrochel is the lowest, gentlest dose here and sits right at the women's RDA — perfect for maintenance or mild shortfalls at excellent value.
~$9.99~$0.08
Why It Scores 7.8 — And The Label Line Behind Each Number
Form & Bioavailability
30% of scoreFerrous bisglycinate (Ferrochel) — the same gentle, well-absorbed chelate as the top picks, just at a lower dose.
- Form
- Ferrous bisglycinate (Ferrochel)
- Diet
- Vegan, Non-GMO, Kosher
Dose Appropriateness
20% of score18 mg matches the women's RDA and is ideal for maintenance, but it is likely too low to correct an established deficiency quickly — the main reason it is not a repletion pick.
GI Tolerance & Safety
20% of scoreThe lowest dose of the gentlest form here — the easiest on the gut of any pick, well suited to dose-sensitive users.
Third-Party Testing & Purity
20% of scoreVegan, Non-GMO and Kosher with in-house GMP quality assurance, but no independent product-level seal (NSF/USP) — verification is self-audited.
Value per Serving
10% of scoreAt ~$0.08 per veg capsule over 120 servings, it is excellent value from a well-known value brand.
- Size
- 120 veg capsules (120 servings)
- Serving
- 1 veg capsule daily
- Price (approx.)
- ~$9.99
- Cost / serving
- ~$0.08
- More Specs
- Elemental iron
- 18 mg per veg capsule
- Facility
- GMP quality-assured (in-house)
Label verified. Every figure read from the Supplement Facts photo, Sep 7, 2026.
Marketing Claims Vs. Reality
18 mg Ferrochel is the gentlest, lowest dose in the set
It combines the gentlest common form (bisglycinate) with the lowest elemental dose here (18 mg), which minimizes GI burden relative to higher-dose picks (Tolkien 2015).
18 mg is right at the RDA for menstruating women
The Recommended Dietary Allowance for iron in women aged 19-50 is 18 mg/day, matching this dose exactly — a correct, verifiable statement.
Suitable to correct an established deficiency quickly
Repletion of low ferritin typically uses higher elemental doses; 18 mg is a maintenance-level dose and is likely too low to correct an established deficiency rapidly.
GMP quality-assured
NOW's GMP program is real but in-house; it is a legitimate quality process, not an independent product-level NSF/USP certification.
What Our Test Actually Found
Match the dose to the job
18 mg is deliberately modest. That makes it the right tool for maintaining iron you already have — or for people who cannot tolerate higher doses — and the wrong tool for rebuilding a genuinely depleted ferritin, which needs more elemental iron.
Gentlest option on the board
The lowest dose of the gentlest form adds up to the easiest-on-the-gut pick here. If previous iron made you nauseous even in chelate form, dropping to 18 mg is a sensible move.
Exactly RDA-level
18 mg is the women's RDA, so this doubles neatly as a daily insurance dose for menstruating women whose intake falls short — closer to a targeted multivitamin's iron than a therapeutic course.
Value brand, in-house testing
NOW delivers strong value and runs a real GMP program, but it is self-audited rather than a product-level NSF/USP seal. Fine for a maintenance dose; if you want certified verification, look higher up the list.
Full analysis: all pros & cons (7), buy if / skip if
- 18 mg Ferrochel — lowest dose here, gentlest on the gut
- Right at the RDA for menstruating women — ideal for maintenance
- Vegan veg caps at excellent value
- Well-known value brand with in-house GMP
- Same gentle chelate form as the top picks
- 18 mg is likely too low to correct an established deficiency quickly
- In-house GMP only — no independent product-level seal
- You are maintaining already-adequate iron, not correcting a deficit
- You are sensitive to higher iron doses and want the gentlest option
- You want RDA-level iron for menstruating women at low cost
- You prefer vegan veg caps from a known value brand
- Your ferritin is genuinely low and you need to replete quickly
- You want independent product-level testing rather than in-house GMP
18 mg of Ferrochel is the lowest, gentlest dose here and sits right at the women's RDA — perfect for maintenance or mild shortfalls at excellent value. It is likely too low to correct an established deficiency quickly, and verification is in-house GMP only.
This is the maintenance and top-up choice, not the repletion choice. At 18 mg of gentle Ferrochel bisglycinate — exactly the RDA for menstruating women — it is ideal for keeping already-decent iron from slipping or for people sensitive to higher doses. If your ferritin is genuinely low, step up to a 25 mg pick.
The maintenance pick, not the repletion pick
The maintenance and top-up choice, not the repletion choice. If you are keeping already-decent iron from slipping — or you are sensitive to higher doses — 18 mg of gentle chelate is perfect. If your ferritin is genuinely low, step up to a 25 mg pick.
If This Doesn’t Fit — Try These
02Nutricost Iron Bisglycinate
Our take: the smart-money buy.
01Thorne Iron Bisglycinate
Our take: if you have confirmed low iron and want one bottle to trust, this is it.
04Solgar Gentle Iron
Our take: a rock-solid, widely-stocked gentle chelate you can grab almost anywhere.
Quick Answers
Is 18 mg enough to fix low iron?
Usually not quickly. 18 mg is the maintenance-level RDA for women and is best for keeping adequate iron topped up. Correcting a diagnosed deficiency typically needs a higher elemental dose, like the 25 mg picks.
Who is this dose ideal for?
People maintaining already-decent iron, those who get GI upset from higher doses, and menstruating women wanting daily RDA-level insurance. It is a maintenance tool, not a repletion course.
Is it gentle on the stomach?
It is the gentlest pick here — the lowest dose of the gentlest form. If even chelated iron at 25 mg bothered you, this is the one to try.
Is in-house GMP good enough?
It is a legitimate quality process for a maintenance product, but it is self-audited rather than an independent product-level seal. For certified testing, choose Thorne.
Sources & Further Reading
2 peer-reviewed sources, each linked to PubMed
- [1] Tolkien Z, et al. PLoS One. 2015;10(2):e0117383. PMID 25700159 — Ferrous sulfate supplementation causes significant gastrointestinal side-effects in adults: a systematic review and meta-analysis. Supports lower-dose, gentle-form dosing to minimize GI burden — the rationale for an 18 mg chelate.
- [2] Stoffel NU, et al. Lancet Haematol. 2017;4(11):e524-e533. PMID 29032957 — Iron absorption from oral iron supplements given on consecutive versus alternate days and as single morning doses versus twice-daily split dosing in iron-depleted women. Absorption efficiency, not just dose size, governs iron uptake — relevant to using a modest maintenance dose effectively.
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