Thorne Iron Bisglycinate 25mg vs Advance 25mg 30 Capsules
Side-by-side comparison of scores, ingredients, prices and real customer feedback for Thorne Iron Bisglycinate 25mg and Advance 25mg 30 Capsules.
Last verified: 07 Apr 2026 · Based on 72 reviews
Thorne Iron Bisglycinate 25mg scores 84.0/100 vs Advance 25mg 30 Capsules at 70.0/100. Thorne Iron Bisglycinate 25mg wins on effectiveness, ingredient quality, side effects. Advance 25mg 30 Capsules is stronger on value for money.
Which is better: Thorne Iron Bisglycinate 25mg or Advance 25mg 30 Capsules?
Thorne Iron Bisglycinate wins with an 84 vs 70 score and costs £3 less at £16.99, backed by NSF Sport certification and blood-test-confirmed results. Active Iron suits those who need to take iron on an empty stomach, though its four-review track record limits confidence in its claims.
— AIScored Editorial Team
How Do the Scores Compare?
Thorne Iron Bisglycinate 25mg
Thorne
|
Advance 25mg 30 Capsules
Active Iron
|
|
|---|---|---|
| Overall Score | 84.0 | 70.0 |
| Effectiveness |
84.0/100
Best
|
80.0/100 |
| Ingredient Quality |
93.0/100
Best
|
70.0/100 |
| Value for Money | 68.0/100 |
70.0/100
Best
|
| Side Effects |
93.0/100
Best
|
90.0/100 |
| Certifications |
91.0/100
Best
|
40.0/100 |
| Best Price |
£16.99
Amazon UK →
Cheapest
|
£19.99 Holland & Barrett → |
| Price per Serving | £0.28 60 servings | N/A |
| Form | Capsules | None |
| Dose | 25mg elemental iron | None |
| Third-Party Tested | ✓ Yes | ✗ No |
| Reviews Analysed | 68 | 4 |
Thorne Iron Bisglycinate 25mg
Pros
- ✓Bisglycinate (Ferrochel®) form is highly bioavailable and consistently reported as gentle on the stomach with no constipation or nausea
- ✓Measurable improvements in ferritin and hemoglobin confirmed by multiple reviewers via blood tests
- ✓NSF Certified for Sport — independently verified for purity and label accuracy
- ✓Ultra-clean formula: only pharmaceutical-grade excipients, no magnesium stearate, fully vegan and allergen-free
Cons
- ✗No vitamin C included — absorption is suboptimal without pairing with ascorbic acid (users note this and add their own)
- ✗25 mg dose may be insufficient for severe iron deficiency recovery; therapeutic correction often requires higher daily intake
- ✗Premium pricing — noticeably more expensive per serving than ferrous sulfate or gluconate alternatives
- ✗At least one reviewer with chronic severe malabsorption found no improvement, ultimately requiring IV iron infusion
Best For
Advance 25mg 30 Capsules
Pros
- ✓Excellent gastrointestinal tolerability—users report no stomach pain or constipation, unusual for iron supplements
- ✓Well-tolerated on an empty stomach, improving convenience and absorption potential
- ✓Consistently high user satisfaction (100% 5-star reviews, n=4)
- ✓Protein-based delivery system targets DMT-1 absorption pathway, supported by Active Iron brand research
Cons
- ✗Limited review volume (4 reviews) restricts statistical confidence in reported benefits
- ✗Not third-party tested—claims of superior absorption and reduced irritation rely on manufacturer data rather than independent verification
- ✗Proprietary formula lacks transparency on exact protein composition and mechanism
- ✗No vegan formulation; unsuitable for plant-based diets
Best For
What does the data say about Thorne Iron Bisglycinate 25mg vs Advance 25mg 30 Capsules?
Thorne Iron Bisglycinate 25mg uses the Ferrochel bisglycinate form at 25mg elemental iron per capsule while Advance 25mg 30 Capsules relies on a different iron compound with the same 25mg dose but no specified delivery details. Thorne comes in capsules and scores 84.0/100 overall with 84.0/100 effectiveness and 93.0/100 ingredient quality. Advance scores 70.0/100 overall with 80.0/100 effectiveness and 70.0/100 ingredient quality yet edges ahead on value at 70.0/100 compared to Thorne's 68.0/100. Thorne costs £16.99 and Advance runs to £19.99.
Women with iron deficiency anaemia or low ferritin should pick Thorne Iron Bisglycinate 25mg especially if they need gentle support during pregnancy or after birth. It suits anyone who suffered constipation or nausea from ferrous sulfate before since users report measurable rises in ferritin and haemoglobin from blood tests. People on a tighter budget or those who simply want better value might choose Advance 25mg 30 Capsules instead. It works for sensitive stomachs and offers convenience when taken on an empty stomach though its four reviews limit confidence in the results.
Both products avoid stomach upset according to user feedback. Thorne carries NSF Certified for Sport verification. Advance shows 100 percent five-star ratings from its small group of buyers. Pill size stays standard for capsules in Thorne with no taste complaints noted. Advance lists no allergens or taste data.
Thorne Iron Bisglycinate delivers 25 mg of elemental iron in the Ferrochel® chelated bisglycinate form, widely praised in reviews for being exceptionally gentle on the digestive system — no nausea, constipation, or metallic aftertaste that commonly plague ferrous sulfate alternatives.
What are the key differences?
Frequently Asked Questions
Which is better, Thorne Iron Bisglycinate 25mg or Advance 25mg 30 Capsules? ▼
Is Thorne Iron Bisglycinate 25mg worth the price compared to Advance 25mg 30 Capsules? ▼
Which has fewer side effects? ▼
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Disclaimer: AIScored provides data-driven comparisons based on publicly available reviews. This is not medical advice. Affiliate links may earn us a commission at no extra cost to you.
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