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🧩 Unlock your brain’s full potential—because your mind deserves the best!
NOW Foods Magtein® delivers 2 grams of patented Magnesium L-Threonate per serving, uniquely formulated to cross the blood-brain barrier and support cognitive function, memory, and natural sleep. This vegan, allergen-free supplement is made in the USA by a trusted family-owned brand with decades of expertise, helping busy professionals optimize brain health and mental clarity daily.




| ASIN | B00JEZQAFG |
| Age Range Description | Adult |
| Allergen Information | Dairy Free, Egg Free, Non-GMO, Nut Free, Soy Free |
| Best Sellers Rank | #2,599 in Health & Household ( See Top 100 in Health & Household ) #59 in Blended Vitamin & Mineral Supplements #490 in Sales & Deals |
| Brand | NOW Foods |
| Brand Name | NOW Foods |
| Concentration | Magnesium 144mg/Magtein 2000mg |
| Customer Reviews | 4.6 out of 5 stars 7,196 Reviews |
| Diet Type | Halal, Kosher, Vegan, Vegetarian |
| Flavor | Unflavored |
| Item Form | Capsule |
| Item Volume | 0.2 Kilograms |
| Item Weight | 667 Milligrams |
| Manufacturer | NOW Sports - Nutrition and Wellness |
| Manufacturer Part Number | P29995 |
| Material Type Free | Egg Free, Gluten Free, Milk Free, Soy Free, Tree Nuts Free, Wheat Free |
| Model Number | 2390 |
| Number of Items | 1 |
| Primary Supplement Type | Magnesium |
| Product Benefits | Brain Health |
| Supplement Formulation | Multi-Supplement |
| UPC | 733739023902 |
| Unit Count | 90 Count |
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.
G**S
Noticeably improved sleep quality and trustworthy brand for supplementation
I started taking Magtein specifically for cognitive support and focus, and I have been using it for several months now. The difference from standard magnesium supplements is that this form is designed to cross the blood-brain barrier, which is why it is marketed for cognitive benefits rather than just general magnesium supplementation. For me, the most noticeable effect has been in sleep quality. I sleep more deeply and feel more rested in the mornings when I take it consistently before bed. Whether that is purely the magnesium effect or the specific L-Threonate form, I cannot say definitively, but the pattern is consistent enough that I keep repurchasing it. NOW Foods is a brand I consistently trust for quality and transparency, and this product is no exception. The veg capsules are easy to swallow and there is no upset stomach which can happen with some magnesium forms. Three capsules per serving is on the higher end but the capsule size is manageable. For the supplement category, this is one I would recommend to anyone specifically interested in the cognitive support angle.
T**R
Helps me fall asleep and helps my brain!
I have this product on subscription because based on my research this is the only type of Magnesium that can get through your blood-brain barrier to help your brain and to help you sleep. I think it does make a difference in my ability to fall asleep. I take it about 30-45 minutes before bed and I rarely ever have trouble falling asleep. I take two pills at night and one in the morning as the product recommends. I've used many NOW products over the years and I've never had any complaints with any of them. I'd highly recommend this product for your brain health and sleep!
M**.
Great product for better sleep quality
Great product. Now is an excellent brand. This is the second order that I’m placing, the magnesium helped me to sleep better since I’m struggling with it. The product has a discount coupon that is a good deal.
F**E
Great for the Heart too!
There are many types of Magnesium. I am 1 year post AFib ablation. I was taking ionic magnesium chloride for my AFib until I discovered this Magtein Magnesium L-Threonate. I used a free ai called brightanswers.ai that accesses censored knowledge. I asked it which of the two magnesium’s was best for my current heart condition and it said this one, Magtein. So I switched. Now I’m taking what’s best for my heart with the added benefit of what’s best for my brain! Yay! Research, and learn for yourself.
J**E
No more leg cramps
These seem to work really well to get rid of my leg cramps. I take them with K2 and Vitamin D and C.
W**A
Good product
Purchased two and then repurchased. Assisted with all magnesium levels and happy with these.
I**V
Product looks low quality at first inspection, content spiled outside capsules into the container.
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.
R**R
Amazing magnesium L-threonate
There is no doubt that Magnesium L-threonate is the best form magnesium but it is bit costly than gluconate,but it is worth of buying. For better results need to take 4-5 capsules a day because elemental magnesium contain is only 144 mg and for adults more than 400 mg per day is required.
A**A
Fantastic
It makes such a difference in memory and cognitive function.
P**I
works well for me!
2nd purchase. helps with my deep sleep and lower my stress level according to my garmin stats
Trustpilot
4 days ago
2 months ago