Public claim check · Vitamins

Holland & Barrett Magnesium Bisglycinate 375mg 90 Capsules

Capsule

checked 10 September 2026 (prices may have changed)

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Holland & Barrett Magnesium Bisglycinate 375mg 90 Capsules capsule supplement product photo

The claim

What Holland & Barrett claims

“Body and brain support”The principal claim, quoted verbatim.
  • “Magnesium bisglycinate provides highly absorbable magnesium to help reduce tiredness and fatigue, while supporting normal muscle and nervous system function.”
  • “Reduces tiredness”
  • “Strong muscles and bones”
  • “Gentle on the stomach”
  • “Less fatigue, more you”Broad marketing rather than a testable outcome, so the report says that plainly instead of grading it.
  • “Body and brain support”Broad marketing rather than a testable outcome, so the report says that plainly instead of grading it.

In total we found 8 printed sentences on the page and label, making 6 claims that can each be checked against human research, plus marketing too broad to test. Each claim gets its own answer in the report.

Headline finding

Does it deliver on cognitive function?

Cognitive functionNo match

No matching evidence.

We hold reviewed evidence for magnesium but no trial that tests this claim.

The tiredness and energy lines are what this bottle is really sold on.

See the evidence behind this answer in the complete report, including what was tested, the dose and preparation used, who took part, and funding information where available.

Whether that evidence applies here comes down to fit: the preparations and amounts those trials used against what is actually in this formula.

See the other claims we checked ↓

The rest of the check

Six outcomes checked. One shown here.

One square per checked outcome. Locked findings open in the complete report.

  • Cognitive functionFinding shown above
  • Strength & powerFinding in the complete report
  • Bone densityFinding in the complete report
  • Digestive comfortFinding in the complete report
  • RecoveryFinding in the complete report
  • The vitamin and mineral claimsFinding in the complete report
Read the complete claim check

Create a free account and use your included credit to unlock this report: every claim answered separately, with study receipts, dose and form comparisons, and better-value alternatives.

Label facts

What the label itself tells us

Excellent

Disclosure, not whether it works.

3 of 3

Active doses printed. No proprietary blend.

Quick answers

Answers already on this page

Does Holland & Barrett Magnesium Bisglycinate 375mg 90 Capsules work?
Headline claim checked: Cognitive function. We hold reviewed evidence for magnesium but no trial that tests this claim. We checked 6 outcomes in all; the complete report answers each one separately.
Does the label disclose all doses?
Yes. 3 of 3 active doses printed. No proprietary blend.
What does Holland & Barrett claim it does?
Body and brain support
Is this medical advice?
Not medical advice. If symptoms are affecting your life, a pharmacist or GP is the right first stop, especially alongside other medication.

Method, independence, limits

Method

Same method for every product: the seller’s claim first, then whether human research measured that outcome, then whether the ingredient, form and dose match the research. How your report works.

Independence

We take no money from supplement brands. No affiliate links, no ads. Subscriber funded, so the verdict owes nothing to anyone.

Snapshot

Frozen from the report generated on 10 September 2026. Formulations and prices change; only a fresh analysis updates it. Tell us if something looks wrong.

Limits

Not medical advice. If symptoms are affecting your life, a pharmacist or GP is the right first stop, especially alongside other medication.

Keep going

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© 2026 De-Influenced. Independent editorial work. You may share this report for personal, non-commercial purposes with our name and date left intact. It may not be sold, edited, or used in marketing, including by supplement brands, without our written permission. It is not a statement that this product does or does not work.