Life Extension Neuro-Mag Magnesium L-Threonate review

Life Extension Neuro-Mag is on this list for shoppers who have read about magnesium L-threonate and want the patented Magtein form without paying top price. Three vegetarian capsules supply 2,000 mg of Magtein magnesium L-threonate, which works out to 144 mg of elemental magnesium, and one 90 capsule bottle is a one-month supply at a regular price of $31.50. That is about $1.05 a serving, the highest cost per dose on this list, but it is cheaper than Momentous Magnesium L-Threonate, which lists $49.99 for 30 servings of the same ingredient. Life Extension says the form has less laxative effect than other kinds of magnesium. The catch for sleep buyers is focus: the product page sells it for memory and cognitive health, not sleep, and the elemental dose is the lowest here. Glycinate products on this list give more magnesium for less money. Buy Neuro-Mag if you specifically want L-threonate.

Who it is for

buyers who want Magtein at a lower price

Price

$31.50 regular price for 90 capsules (30 servings); AutoShip saves 10%.

Reg. Price: $31.50
Quoted from the vendor pricing page on November 13, 2026.

Key features

• 144 mg of magnesium from 2,000 mg Magtein magnesium L-threonate per 3 capsules
• 90 vegetarian capsules, a one-month supply
• Gluten free, non-GMO and vegetarian
• Life Extension says it has less laxative effect than other forms
• 60 count and gummy versions listed

Strengths and weaknesses

• Strength: $31.50 for 30 servings of Magtein, well under Momentous L-Threonate at $49.99
• Strength: AutoShip saves 10% with free shipping
• Strength: Free shipping on orders of $50 or more during the current sale
• Weakness: Only 144 mg of magnesium per serving, the lowest dose here
• Weakness: Three capsules a day
• Weakness: Page markets it for memory and cognition rather than sleep

Key facts

• Form: Magnesium L-threonate (Magtein) capsules
• Magnesium per serving: 144 mg (3 capsules)
• Servings: 30
• Diet: Vegetarian, gluten free, non-GMO
• Price per serving: About $1.05

Where it ranks

Life Extension Neuro-Mag Magnesium L-Threonate is No. 9 in our Best Magnesium Supplements verdict.