SUPPLEMENTS·LIFE EXTENSION
Life Extension Neuro-Mag Magnesium L-Threonate
4.4 · 12,000 shopper ratings
Editor score8.1/10
Best for: Magtein buyers, published-CoA shoppers
Lowest price we found
$30.78
At Amazon (as of – Details)
Buy at Amazon · $30.78 ↗Review updated 2026-07-03
Active
Magnesium L-threonate (Magtein) 144mg elemental
Form
Capsule (3/serving)
Count
90 capsules (30 servings)
Life Extension's three-capsule magnesium L-threonate, with published certificates of analysis.
Life Extension is a four-decade brand with published CoAs. The product uses three capsules per serving and costs more than glycinate products in our lineup.
Price & where to buy
Prices checked 2026-10-11amazon
AmazonBest price✓ Fast delivery · easy returns
Magnesium L-threonate (Magtein) 144mg elemental
$30.78
(as of – Details)
Walmart
Walmart
Availability + price vary by store
Price varies
Not price-checked
Target
Target
Availability + price vary by store
Price varies
Not price-checked
Prices shown were last checked on 2026-10-11 and can change at any time — the price on the retailer's site at checkout is the one that applies. Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product. As an Amazon Associate and affiliate we may earn a commission on purchases made through these links, at no extra cost to you.
How our prices work
We show the price at our recommended retailer as at our last check of that offer (2026-10-11) and the manufacturer's list price for comparison. Amazon prices come from Amazon's own product data service and are refreshed twice a day; each one shows the date and time Amazon gave it, and one older than 24 hours is replaced by “Check price”. Other retailers' prices are checked by hand and show the date of that check. Retail prices move constantly, so the price on the retailer's own page at checkout is the one that applies. More on Amazon prices
Should you buy it?
What we like
- Lab-grade brand with published certificates
What to know before buying
- 3 capsules per serving
- 2-3x the price of glycinate
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At a glance
ActiveMagnesium L-threonate (Magtein) 144mg elemental
FormCapsule (3/serving)
Count90 capsules (30 servings)
CertificationNon-GMO, CoA published
Best timeEvening
Best forThe neuro-magnesium
Compare with alternatives
Quick verdicts for the supplements most often considered alongside the Life Extension Neuro-Mag Magnesium L-Threonate.
VS·HEAD-TO-HEAD
Life Extension Neuro-Mag Magnesium L-Threonate vs Doctor's Best High Absorption Magnesium Glycinate 200mg (240ct)
The highest-rated magnesium on Amazon — 240 tablets from Doctor's Best.
→ Value-focused buyers, athletes
VS·HEAD-TO-HEAD
Life Extension Neuro-Mag Magnesium L-Threonate vs NOW Magnesium Citrate 200mg
The budget workhorse — citrate from a GMP-certified 50-year brand, at the lowest cost per mg in our lineup.
→ Budget magnesium buyers
VS·HEAD-TO-HEAD
Life Extension Neuro-Mag Magnesium L-Threonate vs NOW Foods L-Theanine 200mg (120ct)
The best-value pure L-theanine — 200mg per capsule, GMP-certified, and $15.79 for 120 servings.
→ Single-ingredient theanine at the lowest cost per capsule
Decision support · what no other comparison site has
Take the quiz · 60 secNot sure which one is right for you?
Our 60-second sleep score quiz asks 8 questions and recommends the right sleep gear for your goals. Free, no signup.
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Thorne Glycine (250 capsules, 1 g per serving)
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Frequently asked questions
L-threonate vs glycinate — real difference?
See /natural-sleep-remedies for what the trial evidence actually shows.
Why three capsules?
The label lists three capsules per serving.
Is the premium worth it?
It costs more than the glycinate products in our lineup.
When do effects show?
See /natural-sleep-remedies for what the trial evidence actually shows.
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