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Sports Research

Magtein®, Magnesium L-Threonate, 90 Veggie Capsules (666 mg per Capsule)

4.7 · 1263 reviews
3,181 ₽

Advanced Formula^ 2,000 mg Magnesium L-Threonate Supports Cognitive Health Dietary Supplement Non BPA Quality Matters: Non GMO Project Verified NSF Certified Gluten Free Third Party Tested cGMP Compliant Certified Vegan - American Vegetarian Association ^Magnesium L-Threonate has been shown to cross the blood-brain barrier unlike other magnesium forms like glycinate, citrate, or oxide.

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Advanced Formula^ 2,000 mg Magnesium L-Threonate Supports Cognitive Health Dietary Supplement Non BPA Quality Matters: Non GMO Project Verified NSF Certified Gluten Free Third Party Tested cGMP Compliant Certified Vegan - American Vegetarian Association ^Magnesium L-Threonate has been shown to cross the blood-brain barrier unlike other magnesium forms like glycinate, citrate, or oxide.

Customer reviews

4.0
verified purchase
Need to split the dose

Tried taking 3 capsules before sleep, initially really helped me to relax and sleep through the night. However, after a few days I became wired but tired, I was awake at night feeling stressed. I am switching to taking 2 times per day, 1 in morning and 1 in early evening. Will see if it helps. It would have been better if their instructions are clearer.

8/1/2026
3.0
verified purchase
Increases focus but causes poor sleep

First, the veg capsules smell rancid so I have to open them and dilute the powder in the water. Second, even though it helps me focusing, it causes more severe trouble with sleep. Apparently, it can activate receptors that cause restlessness at night, so my sleep was actually more surfaced, and I felt the need to stretch muscles and move all the time. Another thing, it can cause cystic, acne, I got it while taking another brand, let’s see if it will be the same with this one.

8/20/2025
5.0
verified purchase
Mag

Magnesium threonate totally relaxed me and took away nervous tension, mistakenly took on an empty stomach the first time and felt kinda drowsy

2/20/2026
5.0
verified purchase
Great for focus and sleep

This magnesium L-threonate formula works incredibly well for cognitive support and relaxation. The unique structure allows it to cross the blood-brain barrier, which makes it ideal for enhancing memory, focus, and overall brain health. I’ve also noticed improved sleep quality since starting this. It’s a great choice for anyone looking for a magnesium supplement that targets the brain specifically. Highly recommend for mental clarity and calm.

1/27/2025
5.0
verified purchase
First time trying Mg supplement - I feel a difference in concentration levels

I did some research on what good supplements to add to my diet. Magtein is a trademark and well studied version of magnesium that can cross the blood brain barrier (I read). I feel more concentration after taking it and sleep a bit more soundly on days I've taken this in the mornings. I don't take the full dose (just 1 or 2, not 3). I think it also helped with period pain even though this is not the same magneisum (magnesium glycinate) that is recommended for that. This is also the first time I tried Sports Research brand - I like their packaging design - although I'm not sure if the lid is super air tight. They seem to have third party testing done so I trust their quality. I also tried their D3+K2 and I like that.

9/30/2025
5.0
verified purchase
Good Quality Magnesium Mineral for Brain and Sleep Quality

magnesium mineral in L-threonate form can cross the brain barrier, which is a big benefit. It may also contributes to overall magnesium functions in muscles and joints I usually open the capsules and mix the contents into fruit shakes or even yogurt with fresh fruits—the magnesium taste is almost unnoticeable. It uses only rice flour and rice hulls as filler, without synthetic or unhealthy additives. My sleep quality improved. A little expensive for the one-month package size, but excellent quality and safe ingredients.

8/22/2025
5.0
verified purchase
Third purcharse

I've been using this Magnesium L-Threonate for a few months now, and I'm really happy with the results. I noticed better sleep quality, improved focus during the day, and I wake up feeling more refreshed. The capsules are easy to swallow, and I haven't experienced any stomach discomfort, which is a big plus. The product seems to be high quality ingredients, and I'll definitely purchase it again. Highly recommended for anyone looking for a magnesium supplement that supports brain health and relaxation.

8/7/2026
5.0
verified purchase
Excellent

High quality products Wide range of benefits The package is great. Thank you

3/3/2026
5.0
verified purchase
10/10 buy again

High-quality magnesium that’s easy to take and seems to support better focus and relaxation. Great for daily wellness with a veggie capsule that’s gentle on the stomach!

2/12/2026
5.0
verified purchase
thank you for your professionalism

Thank you for the fast delivery, I haven't used the product. I hope it's like all the others I buy from you, wonderful, thank you once again

11/18/2025