Head to head · Vitamins & Minerals
Thorne Iron Bisglycinate vs Toplux Magnesium Complex
Thorne scores higher overall (8.6 vs 6.8 out of 10) and leads on all five factors we score.
Updated October 2026 from our full reviews · How we score
25 mg of chelated iron (Ferrochel bisglycinate) in a small, NSF Certified for Sport capsule; gentler than iron salts for most, but only for people who need iron.
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TikTok Shop's best-selling magnesium puts 500 mg in one NSF contents-certified capsule, but oxide leads an undisclosed 8-form blend and the dose tops NIH's limit.
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We may earn a commission when you buy through these links — it never affects our scores. How we make money
The short answer
Choose Thorne if…
- People with low ferritin who get stomach upset from ferrous sulfate
- Menstruating women and athletes who need iron under medical guidance
- Vegetarians with confirmed low iron
- You care most about efficacy, quality & purity, value, experience, transparency
Choose Toplux if…
- People who want one capsule a day with independent contents certification
- Adults whose diets run low in magnesium
- Those who tolerate magnesium well or don't mind a mild laxative effect
Side by side
| Iron Bisglycinate | Magnesium Complex | |
|---|---|---|
| Our score | 8.6 / 10 | 6.8 / 10 |
| Efficacy (30%) | 8.5 | 6.5 |
| Quality & Purity (25%) | 9.3 | 7.5 |
| Value (20%) | 7.6 | 6.8 |
| Experience (15%) | 8.6 | 7.3 |
| Transparency (10%) | 9.0 | 5.5 |
| Form | Capsule | Capsule |
| Serving | 1 capsule60 servings per container | 1 Veggie Capsule90 servings per container |
| Price per serving | See retailer | $0.33 |
| Testing & certifications | NSF Certified for Sport | NSF Contents CertifiedcGMP facility |
| Dietary | Gluten-free, Dairy-free, Soy-free | Vegan, Vegetarian, Non-GMO |
| Key ingredients |
|
|
| Flavors | — | — |
| Creator video reviews | 5 | 5 |
Pros and cons
Iron Bisglycinate
- Iron amino-acid chelate, a form NIH says may cause fewer GI side effects
- NSF Certified for Sport
- 25 mg dose sits below the 45 mg upper limit
- Small 18 mm capsule with a short ingredient list
- About $0.27 per day, more than generic ferrous sulfate
- Some users still report nausea on an empty stomach
- No vitamin C or other cofactors included
- Not appropriate without a confirmed need for iron
Magnesium Complex
- Listed under NSF/ANSI 173 contents certification, so label accuracy and contaminants are independently checked
- One capsule a day, and a 90-count bottle lasts three months
- About 33 cents per capsule at the brand's current price
- Short excipient list: a vegetable capsule, a standard filler and flow agents, with no colors or sweeteners
- Buyers frequently report calmer evenings and fewer muscle cramps within two weeks
- Amounts of the eight forms are not disclosed, and poorly absorbed magnesium oxide is listed first
- 500 mg per capsule exceeds NIH's 350 mg upper limit for supplemental magnesium, raising the odds of loose stools
- Large capsules that some buyers find hard to swallow
- Counterfeit listings and look-alike sites using the Toplux name describe different formulas
Our verdicts
Iron Bisglycinate
If you have documented low iron and struggle with conventional iron pills, this is one of the best-tolerated and best-verified options available, at a fair premium. It is not something to take without a reason: check ferritin first, and space it from calcium, thyroid medication and zinc.
Full review
Magnesium Complex
Toplux earns its NSF contents certification, and one capsule a day is easy, which helps explain its loyal following. The eight-form story is mostly marketing, though: amounts are undisclosed, oxide leads the list, and 500 mg exceeds the supplemental upper limit. If you want a gentle, well-absorbed magnesium for sleep or stress, a glycinate or citrate product with a disclosed dose is the better buy; if you tolerate magnesium well and value the certification, Toplux is a reasonable but overhyped choice.
Full review
What creators say
Questions people ask
Is Thorne better than Toplux?
Are Thorne and Toplux third-party tested?
Who should choose Thorne over Toplux?
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