

🧠 Unlock your brain’s full potential with Magtein® — because your mind deserves the best.
NOW Foods Magtein® delivers 2 grams of a patented magnesium L-Threonate formula that uniquely crosses the blood-brain barrier to support cognitive function, memory, and a relaxed mood. Designed for professional lifestyles, its scientifically backed dosing schedule promotes enhanced focus and restorative sleep. Manufactured in the USA with premium ingredients, this supplement is a top-rated choice for brain health and natural cognitive enhancement.




| ASIN | B00JEZQAFG |
| Best Sellers Rank | #2,103 in Health & Household ( See Top 100 in Health & Household ) #40 in Blended Vitamin & Mineral Supplements #416 in Sales & Deals |
| Customer Reviews | 4.6 4.6 out of 5 stars (7,024) |
| Date First Available | April 2, 2014 |
| Is Discontinued By Manufacturer | No |
| Item model number | 2390 |
| Manufacturer | NOW Sports - Nutrition and Wellness |
| Product Dimensions | 2.5 x 2.5 x 4.44 inches; 0.02 ounces |
J**A
Powerful
The first time I tried it, I saw a bright circle that expanded and contracted with my heartbeat. I thought I may even fall to the ground. Whatever it was, the impact was almost instantaneous. Since then, I've taken 3 pills everyday, 1 in the morning and 2 in the evening. It feels as if the content is truly getting to my brain. I am focusing better. Able to recall numbers (such as the lock combination) better. Sleeping longer intervals. It used to be every 2 to 4 hours that I awoke. Now I am sleeping through 4 to 5 hours. Waking up only once during the night (and not twice). I've difficulty swallowing the whole pill. I open the capsule by holding the smaller of the two halves on the bottom, then dump the powder onto the center of my tongue. It gets easier with practice. I don't taste anything, unless I spill some onto other parts of the tongue. Then I wash it down with water or coffee. Even works for two pills at a time.
J**W
Key to good, natural sleep
Long-time standard for ensuring that I can actually sleep - no small thing! I take 3 or 4 an hour before bedtime (per Dr's suggestion) and before long actually feel relaxed and sleepy. This just does not happen for me without Magtein. Magtein facilitates natural feeling and restorative sleep cycle for me. I feel awake and refreshed in the morning -not sickish as I did when I tried Valerian. Worth the price, from a respected brand. I am sticking with Magtein!
Y**R
⭐️⭐️⭐️⭐️⭐️ Excellent Magnesium for Brain Health
I’m 42 years old and have hypothyroidism, which often leaves me dealing with fatigue, brain fog, and memory issues. I decided to try Magtein (Magnesium L-Threonate) because of its reputation for supporting cognitive function, and I’m really glad I did. Unlike other forms of magnesium I’ve tried, this one actually seems to make a noticeable difference. Since starting it, I feel my concentration, focus, and memory are sharper, and I don’t experience the same level of mental fatigue throughout the day. I also like that it’s vegan, non-GMO, and comes in capsules that are easy to take. It has become an important part of my supplement routine, especially to support brain health and learning capacity, which can sometimes be more challenging with thyroid issues. Overall, this is a high-quality supplement that truly delivers on its claims. I would definitely recommend it to anyone who wants better focus, memory, and mental clarity.
R**B
Unique Magnesium Formulation
One of the few supplements I take that I can tell a significant difference in relaxation and mental focus. Great for sleep as well. Expensive, but also unique in that it crosses the blood brain barrier, which is unique for magnesium and has more efficacy for brain function.
A**R
Effective for cognition.
NOW has a reputation for dependable quality and testing. While I by other supplements from Thorne, I frequently use NOW and have been satisfied thus far. Capsules are fairly large, but swallowable. I speculate that they could be opened, but would check with the company first. Not effective for constipation or anxiety, magnesium threonate is the only form to cross the blood brain barrier. Reliable studies have demonstrated safety and cognitive improvement. It took about 2 months for me to notice a cognitive difference. I wasn't brilliant, but I did notice that I had better recall and mental organization. I also take NOW magnesium glycinate for heart and mental health. Am pleased with both.
I**L
Surprisingly Effective for Mental Clarity and Focus
I started taking the NOW Foods Magtein Magnesium L-Threonate because I wanted to support my focus and reduce brain fog. After a couple of weeks of consistent use, I genuinely noticed clearer thinking and more mental stamina throughout the day. It also helped me sleep better at night without making me groggy in the morning, which was a huge bonus I didn’t expect. No stomach discomfort either, unlike some other magnesium supplements I’ve tried. This supplement is now part of my daily routine. I love that it’s in a veggie capsule and doesn’t contain unnecessary fillers. It feels like a high-quality product and definitely worth it if you’re looking to support cognitive health naturally. I just wish I had started using it sooner.
F**L
Finally something that works!
Works when nothing else would. Have tried EVERYTHING and this has improved my sleep tremendously during menopause.
M**S
Effective
Great quality supplement. Helps you relax and sleep better.
R**P
Better for taking in the day
S**K
Works.
M**.
Was initially impressed that this product seemed to work with other supplements to slightly boost my intuition, unfortunately that initially also came with quite severe headaches and blood pressure issues. I have since traced the side affects to either excess B12 supplements in my diet or excess total magnesium due to another form of magnesium that I was also taking at the same time (after discontinuing both I was able to gradually get used to this form of magnesium). Just keep in mind that if you have blood pressure issues / severe headaches shortly after taking this for a short time it may possibly be linked to this product / other dietary adjustments may be required.
W**O
Si, es original. Desde la prepa (15 años) suelo dormirme tarde (2am) hoy me cuesta conciliar el sueño por lo mismo, además el estrés, ansiedad de trabajo y la familia empeora mi calidad de sueño. Magtein no solo ayuda a dormir mejor si no en general me concentro mejor, estoy de mejor humor y me ayuda con mi día a día, nunca vi lo importante que era hasta que se me acabó y me lo dejé de tomar y vi el gran cambio, desde entonces procuro estar bien surtido.
I**V
Paid 43 euro/90 capsules and the product looks suspiciously low quality at first inspection. A lot of the content just spiled outside the capsule into the container.
Trustpilot
2 months ago
1 month ago