Nature Made Magnesium Oxide 400mg vs Doctor's Best High Absorption Magnesium 100mg

Side-by-side AI analysis based on real user reviews from Reddit, Amazon, YouTube & more.

Score Comparison

Nature Made Magnesium Oxide 400mg
Doctor's Best High Absorpti...
Nature Made Magnesium Oxide 400mg
Nature Made
Doctor's Best High Absorpti...
Doctor's Best
Overall Score 4 8
Effectiveness 4/10 8/10
Best
Ingredient Quality 4/10 9/10
Best
Value for Money 5/10 8/10
Best
Side Effects 4/10 9/10
Best
Certifications 6/10 7/10
Best
Best Price £18.99
Cheapest
£26.40
Form Softgels Tablets
Dose 400mg 100mg elemental (per 2 tablets)
Third-Party Tested ✓ Yes ✓ Yes
Reviews Analysed 3 3

Nature Made Magnesium Oxide 400mg

Pros

  • +Very cheap — lowest cost per bottle
  • +High label dose (400mg)
  • +USP Verified for quality assurance
  • +150 servings per bottle

Cons

  • -Extremely poor bioavailability (4-5%)
  • -Contains titanium dioxide (banned in EU food)
  • -Significant GI side effects — laxative effect

Best For

Those on a very tight budget People who specifically want laxative effect Short-term use when nothing else is available
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Doctor's Best High Absorption Ma...

Pros

  • +Albion TRAACS patented chelate — gold standard
  • +Excellent bioavailability and gentle on stomach
  • +240 tablets per bottle — lasts 4 months
  • +Competitive price point for chelated magnesium

Cons

  • -2 tablets per serving for only 100mg elemental
  • -More excipients than some premium brands
  • -Not as widely recognised as NOW or Solgar in UK

Best For

Those wanting a patented chelate form Long-term magnesium supplementation People with sensitive stomachs
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AI

AI Comparison Analysis

Nature Made Magnesium Oxide 400mg vs Doctor's Best High Absorption Magnesium 100mg

Nature Made Magnesium Oxide 400mg: Nature Made Magnesium Oxide is the budget option — cheap, high-dose on paper, but with the worst bioavailability of any magnesium form at roughly 4-5% absorption. The ingredient list includes titanium dioxide (banned in EU food since 2022), soy, and gelatin. It works as a laxative but is a poor choice for addressing magnesium deficiency or improving sleep, muscle function, or stress.

Scores: effectiveness: 4/10, ingredient_quality: 4/10, value_for_money: 5/10, side_effects: 4/10, certifications: 6/10, overall: 4/10

Doctor's Best High Absorption Magnesium 100mg: Doctor's Best High Absorption Magnesium uses the patented Albion TRAACS chelate, which is considered the gold standard in mineral chelation technology. Bioavailability is excellent and the bisglycinate form is gentle on digestion. The 240-tablet bottle offers good long-term value, though the serving size of 2 tablets for 100mg elemental is less convenient than some competitors.

Scores: effectiveness: 8/10, ingredient_quality: 9/10, value_for_money: 8/10, side_effects: 9/10, certifications: 7/10, overall: 8/10

Disclaimer: AIScored provides AI-generated comparisons based on publicly available reviews. This is not medical advice. Affiliate links may earn us a commission at no extra cost to you.