The claim
365 Day money back guarantee
What we found
Fine printWritten terms: unopened bottles, RMA, product price only; the first bottle of a first purchase is a trial.
Source · checked Nov 14, 2026
Product review
Bioptimizers Magnesium Breakthrough review, scored
Seven magnesium forms and a 365-day window; testing is in-house.
Health Corners editorial team · Claims checked against seller pages · Updated
#7 of 9 products in Vitamins & Multivitamins
Calculated from published specs and owner feedback
See all vitamins & multivitamins- Overall 5.7
- Social 7.1
- Usability 4.3
Up next in Vitamins & Multivitamins
Strengths and drawbacks
Published specs and owner feedback, not a hands-on test.
Strengths
- Every magnesium form is named on the page
- Written 365-day window covers subscriptions too
- One-time buying is offered next to the subscription
Drawbacks
- No independent lab or batch certificate is named
- Unopened bottles only, with shipping not refunded
- Trustpilot buyers report charges after cancelling
How the score breaks down
Published features and owner comments · not a lab test.
Published features and owner comments · not a lab test.
- Overall5.7
- Social7.1
- Usability4.3
Usability4.3/10
Label transparency5.0/10
Testing and manufacturing2.0/10
Price and subscription terms5.0/10
Guarantee and returns6.0/10
Support and owner reports4.0/10
Social7.1/10
Marketplace reviews5.0/10
Marketplace reviews9.2/10
RedditNot enough data
Independent web and YouTubeNot enough data
How each score was set
Usability 4.3 /10
From published features and owner comments · not a lab test.
- Label transparency5.0/10
- Three of five: forms named, other ingredients listed, serving size and count given; no per-form doses and the humic/fulvic blend amount is unprinted.
- Testing and manufacturing2.0/10
- One of five: Prop 65 compliance stated; the 'BIOLab' tests are in-house, no outside lab, batch certificate, cGMP statement or named certification found.
- Price and subscription terms5.0/10
- Price and a one-time option are clear and there is a subscription discount; free shipping starts at $99 and subscriptions are cancelled by phone or email.
- Guarantee and returns6.0/10
- 365 days is long and written, but unopened bottles only, RMA needed, shipping not refunded and multi-bottle orders must keep one back.
- Support and owner reports4.0/10
- Phone Mon-Fri 10-8 ET and email exist, but Trustpilot (2.5 of 5, 537) reports unanswered emails, charges after cancelling and a wrong item; staff replies to negatives.
Social 7.1 /10
Average of the independent owner-review sources listed below.
- Marketplace reviews5.0/10
- Brand-level · 537 reviews · trustpilot.com
- Marketplace reviews9.2/10
- Product · 19,668 reviews · amazon.com
- RedditNot enough data
- Searched; not enough owner reviews to score.
- Independent web and YouTubeNot enough data
- Searched; not enough owner reviews to score.
Claims we checked
The published claim, then what we found. Live statuses. How we review
The claim
Over 500 formula and quality tests
What we found
Fine printNo test list, lab name or result is shown on the page.
Source · checked Nov 14, 2026
The claim
Free shipping on $99+ in USA
What we found
VerifiedPolicy banner and product page both print the $99 threshold.
Source · checked Nov 14, 2026
The claim
Seven forms of magnesium, 500 mg elemental
What we found
VerifiedThe ingredient text lists the seven forms and the serving text gives 500 mg elemental from two capsules.
Source · checked Nov 14, 2026
We tried it
A coupon-code check on Fun Coupons, our partner coupon site. Not a product test.
Code tried by code-check on Nov 8, 2026: worked, 10% off.
Get it at Fun CouponsCode shown on our partner site Fun Coupons. We may earn a commission.
Verified saving
10% off Bioptimizers
Checked Nov 8, 2026Code checked by our checker
Get it at Fun Coupons 
on Fun CouponsHow we verify
Fun Coupons checked this offer on Nov 8, 2026 (code checked by our checker). We show a saving only when its amount is stored and it was checked in the last 30 days. We never show the code here.
The code is shown on Fun Coupons, our partner site with this store’s verified offer. We may earn a commission.
Bioptimizers coupon by email
Same verified offer as the card, from Fun Coupons. Sent by EmailerPros as “Fun Coupons via Health Corners.”
Max 3 deal emails a week. Confirm by email. Unsubscribe anytime.
More from this brand
Other products from Bioptimizers. Not reviewed yet.
- MassZymesNot yet reviewed
- Probiotic BreakthroughNot yet reviewed
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