Thorne, Iron Bisglycinate, 25 mg, 60 Capsules vs Solgar, Gentle Iron, 25 mg, 180 Capsules
Thorne, Iron Bisglycinate, 25 mg, 60 Capsules (#2, best premium) vs Solgar, Gentle Iron, 25 mg, 180 Capsules (#3): in our Gentle Iron Supplements scoring the Thorne, Iron Bisglycinate, 25 mg, 60 Capsules totals 8.8/10 and the Solgar, Gentle Iron, 25 mg, 180 Capsules 6.9/10.
We may earn a commission when you buy through our links. Prices and availability shown are accurate as of Aug 5, 2026 and are subject to change; the merchant's price at purchase applies.
TopsFive comparison scores
Side by side
| Thorne, Iron Bisglycinate, 25 mg, 60 Capsules | Solgar, Gentle Iron, 25 mg, 180 Capsules | |
|---|---|---|
| Price | $16 | — |
| Iron Form | Ferrochel ferrous bisglycinate chelate | Iron bisglycinate chelate |
| Elemental Iron | 25 mg | 25 mg |
| Vitamin C | None | None |
| Serving Size | 1 capsule | 1 vegetable capsule |
| Servings Per Container | 60 | 180 |
| Other Active Ingredients | None | None |
| Other Ingredients | Hypromellose capsule, microcrystalline cellulose, leucine, silicon dioxide | Microcrystalline cellulose, vegetable cellulose, vegetable magnesium stearate |
| Testing / Certification | NSF Certified for Sport | Certified Gluten Free; Kosher Parve; no listed product-specific potency certification |
How they differ in real use
Built from our gentle iron supplements scoring, each product's published specifications, and verified owner feedback — not hands-on testing.
Both the Thorne, Iron Bisglycinate, 25 mg, 60 Capsules and the Solgar, Gentle Iron, 25 mg, 180 Capsules made our Top 5 Gentle Iron Supplements, at #2 (best premium) and #3. This has the strongest certification evidence and a research-aligned 25 mg dose, but its much higher cost per mg keeps it just behind the iTested California Gold product. Its 10,000+ recent sales reinforce the selection without overriding the weighted criteria. Among the uncertified options, its short excipient list, research-aligned dose and strong bottle value produce the best weighted score. Its roughly 47,000 reviews and 3,000+ recent sales also win the close popularity tiebreaker.
We score gentle iron supplements on Third-Party Testing (30%), Form & Bioavailability (25%), Dose vs Research (20%), Label Transparency (15%) and Value (10%). On that basis the Thorne, Iron Bisglycinate, 25 mg, 60 Capsules totals 8.8 out of 10 and the Solgar, Gentle Iron, 25 mg, 180 Capsules 6.9. The widest gap is Third-Party Testing, where the Thorne, Iron Bisglycinate, 25 mg, 60 Capsules scores 10 against 2 for the Solgar, Gentle Iron, 25 mg, 180 Capsules — independent certification or a published certificate of analysis. Value also separates them: 9 for the Solgar, Gentle Iron, 25 mg, 180 Capsules versus 4 for the Thorne, Iron Bisglycinate, 25 mg, 60 Capsules.
On paper, the specifications that actually differ: Iron Form — Ferrochel ferrous bisglycinate chelate on the Thorne, Iron Bisglycinate, 25 mg, 60 Capsules versus Iron bisglycinate chelate on the Solgar, Gentle Iron, 25 mg, 180 Capsules; Serving Size — 1 capsule on the Thorne, Iron Bisglycinate, 25 mg, 60 Capsules versus 1 vegetable capsule on the Solgar, Gentle Iron, 25 mg, 180 Capsules; Servings Per Container — 60 on the Thorne, Iron Bisglycinate, 25 mg, 60 Capsules versus 180 on the Solgar, Gentle Iron, 25 mg, 180 Capsules; Other Ingredients — Hypromellose capsule, microcrystalline cellulose, leucine, silicon dioxide on the Thorne, Iron Bisglycinate, 25 mg, 60 Capsules versus Microcrystalline cellulose, vegetable cellulose, vegetable magnesium stearate on the Solgar, Gentle Iron, 25 mg, 180 Capsules; Testing / Certification — NSF Certified for Sport on the Thorne, Iron Bisglycinate, 25 mg, 60 Capsules versus Certified Gluten Free; Kosher Parve; no listed product-specific potency certification on the Solgar, Gentle Iron, 25 mg, 180 Capsules. They match on Elemental Iron, Vitamin C and Other Active Ingredients.
The Thorne, Iron Bisglycinate, 25 mg, 60 Capsules lists at $16; the Solgar, Gentle Iron, 25 mg, 180 Capsules's current price is on the merchant page. Owners praise the Thorne, Iron Bisglycinate, 25 mg, 60 Capsules for NSF Certified for Sport listing is product-specific and 25 mg elemental iron matches the bisglycinate dose used in the cited randomized pregnancy trial; the most common complaint is no vitamin C appears on the Supplement Facts panel. Owners praise the Solgar, Gentle Iron, 25 mg, 180 Capsules for 25 mg elemental iron as bisglycinate matches the cited randomized pregnancy-trial dose and 180 one-capsule servings at about $0.09 each; the most common complaint is no vitamin C appears on the Supplement Facts panel.
Thorne, Iron Bisglycinate, 25 mg, 60 Capsules
- NSF Certified for Sport listing is product-specific
- 25 mg elemental iron matches the bisglycinate dose used in the cited randomized pregnancy trial
- Single-active formula with four disclosed capsule excipients
- No vitamin C appears on the Supplement Facts panel
- $0.27 per serving is roughly three times the cost of the two value leaders
Solgar, Gentle Iron, 25 mg, 180 Capsules
- 25 mg elemental iron as bisglycinate matches the cited randomized pregnancy-trial dose
- 180 one-capsule servings at about $0.09 each
- Label lists Certified Gluten Free, vegan and Kosher Parve attributes
- No vitamin C appears on the Supplement Facts panel
- No USP, NSF or public product-specific certificate of analysis is shown on the iHerb page
Which should you buy?
The Thorne, Iron Bisglycinate, 25 mg, 60 Capsules is the better fit for competitive athletes who require a recognized sport certification and buyers prioritizing certification over bottle price — it is the higher-scoring pick here, chiefly for Third-Party Testing. The Solgar, Gentle Iron, 25 mg, 180 Capsules is the better fit for buyers wanting a 180-serving bottle and vegan buyers seeking certified gluten-free and kosher labeling, and the stronger choice if Value matters more to you than the overall score. The Thorne, Iron Bisglycinate, 25 mg, 60 Capsules is a poor fit for budget-first shoppers; the Solgar, Gentle Iron, 25 mg, 180 Capsules is a poor fit for buyers requiring USP or NSF product certification.
Choose the Thorne, Iron Bisglycinate, 25 mg, 60 Capsules if
- Competitive athletes who require a recognized sport certification
- Buyers prioritizing certification over bottle price
Skip it if
- Budget-first shoppers
- Buyers wanting vitamin C in the same capsule
Choose the Solgar, Gentle Iron, 25 mg, 180 Capsules if
- Buyers wanting a 180-serving bottle
- Vegan buyers seeking certified gluten-free and kosher labeling
Skip it if
- Buyers requiring USP or NSF product certification
- Buyers wanting vitamin C in the same capsule
Common questions
Is the Thorne, Iron Bisglycinate, 25 mg, 60 Capsules better than the Solgar, Gentle Iron, 25 mg, 180 Capsules?
In our Gentle Iron Supplements ranking the Thorne, Iron Bisglycinate, 25 mg, 60 Capsules scores higher overall, 8.8 to 6.9, with the biggest advantage in Third-Party Testing. The Solgar, Gentle Iron, 25 mg, 180 Capsules is stronger on Value, so it is the better pick if that matters most to you.
What is the main difference between the Thorne, Iron Bisglycinate, 25 mg, 60 Capsules and the Solgar, Gentle Iron, 25 mg, 180 Capsules?
The headline spec difference is Iron Form: Ferrochel ferrous bisglycinate chelate on the Thorne, Iron Bisglycinate, 25 mg, 60 Capsules versus Iron bisglycinate chelate on the Solgar, Gentle Iron, 25 mg, 180 Capsules. In use, the gap that matters most is Third-Party Testing (10 vs 2 in our scoring): independent certification or a published certificate of analysis.