Life Extension Neuro-Mag Magnesium L-Threonate
Best for: Magtein buyers, published-CoA shoppers
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 2026-11-01Prices shown were last checked on 2026-11-01 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 (2026-11-01) and, when Amazon reports one, its 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
Compare with alternatives
Quick verdicts for the supplements most often considered alongside the Life Extension Neuro-Mag Magnesium L-Threonate.
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
Doctor's Best High Absorption Magnesium Glycinate 200mg (240ct) review →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
NOW Magnesium Citrate 200mg review →Life Extension Neuro-Mag Magnesium L-Threonate vs NOW Foods L-Theanine 200mg (120ct)
The best-value L-theanine — 200mg per capsule, GMP-certified, and $15.79 for 120 servings.
→ Theanine at the lowest cost per capsule
NOW Foods L-Theanine 200mg (120ct) review →Not sure which one is right for you?
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More supplements we compared
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Thorne Magnesium Bisglycinate Powder (60 servings)
Thorne Glycine (250 capsules, 1 g per serving)
Life Extension Melatonin 6 Hour Timed Release 300 mcg (100ct)
Nature Made Melatonin 5mg (300ct)
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.