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Magnesium L-Threonate Mineral Supplement for Nervous System Support - May Support Cognitive Health, Learning and Memory - 90 Veggie Capsules

Prices as of September 26, 2026, as listed by each retailer — verify the current price on the retailer's site before purchase.

Price history tracked at Macy's price tracker

14-day low
$43.29
Sep 13 · Macy's
Best price
$43.29
−0% vs high
14-day high
$43.29
All stores
$43$43$43
Sep 13Sep 26
  • Macy's
Lowest in 14 days: $43.29 at Macy's. Highest: $43.29. Current best is 0% below the 14-day high.

About this product

Swanson Magnesium L-Threonate is a dietary supplement formulated to support cognitive health, learning, and memory. This science-backed formula contains Magtein, a patented form of magnesium that readily crosses the blood-brain barrier to nourish brain cells. Each serving provides 144 mg of magnesium from 2.01 g of magnesium L-threonate in easy-to-swallow vegetarian capsules. The product offers a 30-day supply and is designed for daily use, with recommended intake of one capsule in the afternoon and two in the evening. Manufactured in the USA under GMP standards, it undergoes third-party testing for purity and potency.

  • Contains Magtein form of magnesium
  • Crosses blood-brain barrier
  • 144 mg magnesium per serving
  • 90 vegetarian capsules
  • Made in USA
  • Third-party tested

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Magnesium L-Threonate Mineral Supplement — Price History