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Source Naturals, Magtein, Magnesium L-Threonate, 667 mg, 45 Capsules

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In Stock
  • Expiration Date: Jun 2020
  • Shipping Weight: 0.18 lbs (0.08 kg)
  • Product Code: SNS-02484
  • UPC Code: 021078024842
  • Package Quantity: 45 Capsules
  • Dimensions: 2 x 2 x 3.6 in, 0.15 lbs (0.07 kg)
Product Overview


  • For Learning and Memory
  • Dietary Supplement
  • Magtein.-Think Clearly

Magnesium (Mg) plays an essential role in supporting cognitive function and brain health. Preliminary research suggests that Magtein (magnesium L-threonate) may provide more magnesium to the brain than other forms of magnesium. It is theorized that this is the reason why Magtein was shown in preclinical studies to support healthy memory and learning as well as healthy brain synapse density in regions of the brain associated with memory.

Suggested Use

3 capsules daily, preferably 2 capsules during the day and 1 capsule 1-2 hours before bed. Start with 1 capsule daily and gradually increase to 3 capsules daily.

Other Ingredients

Gelatin (capsule), maltodextrin, silica, and magnesium stearate.

Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.


Note: If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product.

Store in a cool, dry place.

Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children.

Supplement Facts
Serving Size: 3 Capsules
Servings Per Container: 15
  Amount Per Serving %DV
Calories 10  
Magnesium (as magnesium L-threonate) 144 mg 36%
Magtein (magnesium L-threonate) 2 g
†Daily value not established.
iHerb Customer Reviews

Fast arrival.

Posted by 4933509170365743796 on Oct 13, 2016

Love this magnesium for autoimmune disorder..Has lesoned my pain..decreased my brainfog..I just need bigger bottle!

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Posted by JOSPHH on Sep 19, 2016

its ok

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provides gentle relaxation

Posted by KentuckyWildcat on Jan 23, 2016

Seems to gently relax my mind so I can drift off to sleep. Also very good if I awaken in the middle of the night and have trouble going back.

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Easy to take

Posted by Krisinsight on Sep 02, 2015

Magnesium Threonate is easy for me to take and does not affect my digestive system at all and crosses the blood brain barrier with ease. Source Natural's Threonate is priced reasonably but I cannot eat or have anything to do with beef. Gelatin comes from beef unless listed otherwise and the capsules are gelatin, so I empty them and take the powder in yogurt. The tasteless powder and yogurt work just fine.

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i have a good feeling about magtein

Posted by Reviewer2402627 on Mar 08, 2015

good source

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