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

By Source Naturals

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  • 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)
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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), 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.

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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

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Posted by Reviewer1057924 on Oct 17, 2013

it got my attention when I saw adds for the new magnesium so I wanted to try it. Ive taken this on and off but had the impression that once it gets in your blood it works really well. I had to lecture for a workshop and I was amazing on this!!

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3 people found the following review helpful

very very good

Posted by Reviewer1344878 on May 24, 2013

yes, this is helpful for your memory...I am 86 now and have some senior moments now and then....no more since taking these. iherb is the best store to get your supplements, no matter what you are asking for...

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3 people found the following review helpful


Posted by Reviewer1733570 on Feb 14, 2014

I subscribe to the list of testers of this product who failed to see the theory put into practice, I felt no effect whatsoever, I have as bad a memory after using this bottle, nonetheless I can remember other magnesium products have no effect on me also.

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3 people found the following review helpful

This is all about energy

Posted by Reviewer1448770 on Jul 24, 2014

With this supplement I did not sleep much and did not need much sleep, my energy was just absolutely tremendous. However, my wife too this same supplement with me and did not notice the effects, no I am not magnesium deficient as I take the magnesium every night (magnesium glycinate). I want to fallow this up with testing of a threonate only supplement.

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2 people found the following review helpful

Hard to say

Posted by odereviews on Jul 09, 2013

It's hard to say after just 45 capsules, if these helped or not. These didn't help my memory, but I'm pretty sure these helped me to focus better on daily tasks. I might test with larger package next time. If you are looking for a "brain-boost", why not give these a go?

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2 people found the following review helpful

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