Best Iron Bisglycinate Supplements 2026: Cost per Effective Dose
Top pick for Iron Bisglycinate: Solgar Gentle Iron (Iron Bisglycinate) 25 mg — 25mg per 1 capsule, $0.11/day. Our best-value pick.
All Iron Bisglycinate Supplements Compared
| Product | Brand | Dose / Serving | Cost / Day | Certification (as labelled) | Pick | Buy |
|---|---|---|---|---|---|---|
| NOW Foods Iron 36 mg Double Strength (Ferrochel) | NOW Foods | 36mg / 1 capsule | $0.11 | None | Budget Pick | Buy |
| Solgar Gentle Iron (Iron Bisglycinate) 25 mg | Solgar | 25mg / 1 capsule | $0.11 | None | Best Value | Buy |
| Thorne Iron Bisglycinate 25 mg | Thorne | 25mg / 1 capsule | $0.27 | NSF Certified for Sport | Quality Pick | Buy |
| MegaFood Blood Builder | MegaFood | 26mg / 1 tablet | $0.32 | None | Buy |
Registry check · Iron Bisglycinate
Does anyone independently verify Iron Bisglycinate supplements?
1 of the 4 Iron Bisglycinate products on this page is confirmed in NSF Certified for Sport: Thorne Iron Bisglycinate 25 mg. For the others, the listing may name a certification, but we did not find it in a public registry — that is not evidence against them, only an absence of independent confirmation.
This is one of the 8 long-established nutrients where verified options exist, unlike newer arrivals such as NMN or lion’s mane, where 14 of 17 categories have none. If you want a certified Iron Bisglycinate product, you can actually buy one.
Certification is not a dosing guarantee. Across the whole catalogue, certified products reach the clinically studied dose 57% of the time and uncertified ones 71% — a gap too small to mean anything (Fisher p = 0.185). Read the Iron Bisglycinate dose column either way.
The 4 products on this page checked against all 5,317 US NSF, USP and Informed Sport listings, 2026-08-25. Full method and limitations.
What Iron Bisglycinate labels show
Priced per day, these iron bisglycinate products run $0.11 to $0.32 — a 2.9× gap between the cheapest and dearest iron bisglycinate here, across 4 brands.
In-Depth Iron Bisglycinate Guides
Go deeper on iron bisglycinate — by goal, by form, and what the evidence actually supports:
- Best Iron Supplement
- Best Iron Bisglycinate (whole dose per capsule, verification, cost)
- Third-Party Tested Iron (which are on NSF or USP lists)
- Non-Constipating Iron (gentler forms, doses, alternate-day)
- Best Iron for Women
- Is 25mg Enough?
- Ferrous Sulfate vs Bisglycinate
- Iron Gummies (how much iron vs the RDA)
- Best Time to Take It
- Ferritin Test Explained
- Low-Intake Signs (who is at risk, the test)
Our Picks
Best Value: Solgar Gentle Iron (Iron Bisglycinate) 25 mg
25mg per 1 capsule. $0.11/day. 90 servings per container at $9.65.
Quality Pick: Thorne Iron Bisglycinate 25 mg
25mg per 1 capsule. NSF Certified for Sport. $0.27/day. 60 servings per container at $16.00.
Budget Pick: NOW Foods Iron 36 mg Double Strength (Ferrochel)
36mg per 1 capsule. $0.11/day. 90 servings per container at $9.62.
Dose check · Iron Bisglycinate
1 of these 4 put more than the studied Iron dose in one capsule
One product on this page puts more than 27 mg, the top of the studied range, in a single capsule: NOW Foods Iron 36 mg Double Strength (Ferrochel). That is not a reason to avoid it, but one capsule gives more than the trials used, so the lowest price per milligram is not automatically the best buy.
The label trap on Iron Bisglycinate: a 325mg ferrous sulfate tablet is only ~65mg elemental (~20%); gluconate ~12%, fumarate ~33% — read the elemental-iron line not tablet weight
Method: studied range from our own Iron Bisglycinate dosage guide (PMID 29032957), checked against the 4 products above that state a dose — capsules in whole servings, powders in fractions. Trial doses, not a prescription.
The shelf · Iron Bisglycinate
The Iron Bisglycinate shelf is unusually consistent
Across 4 products from 4 brands, the cheapest day is NOW Foods Iron 36 mg Double Strength (Ferrochel) at $0.11 and the priciest is MegaFood Blood Builder at $0.32, a gap of 2.9×. With prices this close, which of these Iron Bisglycinate products has been independently checked matters more than the price.
Method: the 4 Iron Bisglycinate products above, compared on label facts, serving size, servings per container, form, price. Not a dosing recommendation.
How these 4 Iron Bisglycinate products were ranked
1 of these 4 is confirmed in a certifier's registry — the only iron bisglycinate row where the claim is independently backed — and the rest are ranked on cost per day at the labelled serving. Commission does not enter it: the rate is the same whichever iron bisglycinate you buy. Full methodology.