Gentle Iron (Iron Bisglycinate) 20mg Vegetable 180 Capsules vs Advance 25mg 30 Capsules
Side-by-side comparison of scores, ingredients, prices and real customer feedback for Gentle Iron (Iron Bisglycinate) 20mg Vegetable 180 Capsules and Advance 25mg 30 Capsules.
Last verified: 07 Apr 2026 · Based on 66 reviews
Gentle Iron (Iron Bisglycinate) 20mg Vegetable 180 Capsules scores 82.0/100 vs Advance 25mg 30 Capsules at 70.0/100. Gentle Iron (Iron Bisglycinate) 20mg Vegetable 180 Capsules wins on ingredient quality, value for money, side effects.
Which is better: Gentle Iron (Iron Bisglycin... or Advance 25mg 30 Capsules?
Solgar wins with an 82 vs 70 score, backed by documented ferritin improvements and a lower price at £18.84. Active Iron suits those who specifically need a higher 25mg dose in one capsule and prefer taking iron on an empty stomach.
— AIScored Editorial Team
How Do the Scores Compare?
Gentle Iron (Iron Bisglycin...
Solgar
|
Advance 25mg 30 Capsules
Active Iron
|
|
|---|---|---|
| Overall Score | 82.0 | 70.0 |
| Effectiveness |
80.0/100
Best
|
80.0/100
Best
|
| Ingredient Quality |
90.0/100
Best
|
70.0/100 |
| Value for Money |
76.0/100
Best
|
70.0/100 |
| Side Effects |
92.0/100
Best
|
90.0/100 |
| Certifications |
72.0/100
Best
|
40.0/100 |
| Best Price |
£18.84
Amazon UK →
Cheapest
|
£19.99 Holland & Barrett → |
| Form | Capsules | None |
| Dose | None | None |
| Third-Party Tested | ✗ No | ✗ No |
| Reviews Analysed | 62 | 4 |
Gentle Iron (Iron Bisglycinate) ...
Pros
- ✓Iron bisglycinate form is exceptionally gentle — virtually no constipation or GI irritation across the large majority of reviewers
- ✓Multiple users confirm measurable ferritin and haemoglobin improvements via blood tests
- ✓Widely reported improvements in energy levels, reduced fatigue, and better hair condition
- ✓Certified vegan, Kosher Parve, Halal, Non-GMO, gluten-free, and dairy-free — suitable for restricted diets
Cons
- ✗20mg dose is conservative and may be insufficient for severe iron deficiency without taking 2–4 capsules daily, which increases cost significantly
- ✗Not third-party tested for purity or label accuracy
- ✗Requires avoiding calcium-rich foods or supplements near dosing time and ideally co-administration with vitamin C — some find this inconvenient
- ✗Isolated reports of digestive upset, suggesting individual tolerance still varies
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 Gentle Iron (Iron Bisg... vs Advance 25mg 30 Capsules?
Solgar Gentle Iron offers 180 capsules for £18.84, while Active Iron Advance costs £19.99 for just 30 capsules. This price gap helps Solgar Gentle Iron win on value with a score of 76/100. It uses 20mg of iron bisglycinate. This specific form is very easy on the stomach. Active Iron Advance uses a 25mg dose. It is designed to be taken on an empty stomach without causing the usual pain or constipation. Both products are tied for effectiveness at 80.0/100.
Vegetarians and vegans should choose Solgar Gentle Iron for its high ingredient quality score of 90/100. It is effective for those with heavy periods who need to fix low ferritin levels. Active Iron Advance is better for people with very sensitive stomachs who have struggled with supplements before. It has perfect five-star reviews, though this is only based on four people. Solgar Gentle Iron is the overall winner with a score of 82.0/100.
The 20mg dose in Solgar Gentle Iron is quite conservative. If you have a severe deficiency, you may need to take up to four capsules a day. This will increase your costs. Active Iron Advance is more expensive but aims to stop GI distress. Solgar uses vegetable capsules which are suitable for many diets. Active Iron Advance lacks the same high ingredient score, landing at 70/100.
Solgar Gentle Iron is an iron bisglycinate supplement that stands out primarily for its exceptional gastrointestinal tolerability, with the vast majority of 62 reviewers across Amazon, Holland & Barrett, and iHerb explicitly contrasting it favourably against conventional iron supplements that caused constipation or nausea.
What are the key differences?
Frequently Asked Questions
Which is better, Gentle Iron (Iron Bisglycinate) 20mg Vegetable 180 Capsules or Advance 25mg 30 Capsules? ▼
Is Gentle Iron (Iron Bisglycinate) 20mg Vegetable 180 Capsules worth the price compared to Advance 25mg 30 Capsules? ▼
Which has fewer side effects? ▼
Related Product Comparisons
Thorne Iron Bisglycinate 25mg
vs Gentle Iron (Iron Bisglycinate) 20mg Vegetable 180 Capsules
Thorne Iron Bisglycinate 25mg
vs Advance 25mg 30 Capsules
Gentle Iron (Iron Bisglycinate) 20mg Vegetable 180 Capsules
vs 30 Capsules
Gentle Iron (Iron Bisglycinate) 20mg Vegetable 180 Capsules
vs Active Iron for Women 60 Capsules
Gentle Iron (Iron Bisglycinate) 20mg Vegetable 180 Capsules
vs Pregnancy 30 Tablets + 30 Capsules
Gentle Iron (Iron Bisglycinate) 20mg Vegetable 180 Capsules
vs Gentle Iron 20mg 90 Vegi Capsules
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.
Feedback & Suggestions
Spotted an issue? Wrong price, incorrect data, or something else off? Let us know and we'll fix it.
Missing a product you'd like us to review? Tell us the product name and we'll consider adding it.