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

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

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

In Stock
45 Capsules
45 Capsules
180 Capsules
  • Expiration Date: Jan 2021
  • Shipping Weight:
    0.18 lbs
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  • Product Code: SNS-02484
  • UPC Code: 021078024842
  • Package Quantity: 45 Capsules
  • Dimensions:
    3.6 x 2 x 2 in, 0.15 lbs
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Combo Offer!
Save $2.00 when you purchase these items today for only $17.26
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

did it do anything except being expensive ?

Posted by adhd-researcher on Sep 02, 2017 | Verified Purchase

not impressed... I tried a lot of types & brands of magnesium expensive, that for sure...

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Good product. What l was looking for and at a reasonable price.

Posted by iHerb Customer on Aug 28, 2017 | Verified Purchase

Reasonable price, but could be better and have more quantity.

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Excellent for relaxation

Posted by iHerb Customer on Jun 29, 2017 | Verified Purchase

When I get stressed or anxious in the evenings, one of these will help me relax and make sure I get a good night's sleep. Combined with a soothing cup of tea, the calming effects are quick and last through the night.

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Wow, Excellent

Posted by iHerb Customer on Jun 16, 2017 | Verified Purchase

This stuff is amazing. Can't praise it enough.. this is my number one supplement and I do take a number. BP has improved, sleep and mental clarity excellent. Fantastic!

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Different form of other magnesium supplements

Posted by iHerb Customer on Apr 28, 2017 | Verified Purchase

Cannot give my head, but seems to give deep sleep when taken evenings. And seems to clear my head (thinking is sharper). Started to take second time and it has worked again.

Thanks for your feedback!