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"everything is best in business"
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Magnesium made for your mind: Magnesium is involved in over 300 enzymatic reactions in the body, making it essential to get enough—in the right form. MagteinⓇ Magnesium L-Threonate is a unique clinically studied form that supports brain health and function.*
Magnesium (from 2,000 mg Magtein® Magnesium L-Threonate), Vegetable Cellulose Capsule, Stearic Acid, Cellulose, Silica
Use only as directed. Take 3 capsules daily. For best results take in divided doses, 1 capsule in the morning and 2 capsules two hours before sleep. Store in a cool, dry place.

Since 1973, Solaray has believed that what you put in your body should be proven, not promised.
We source our own raw materials and triple-test every lot.
We manufacture 95% of our products for full control.
15,000 tests per month verify ingredient potency and purity.^

In an industry where quality can vary widely, testing isn't just a step in the process. It is the process.
✅ Passed Testing for Heavy Metals**
Arsenic, cadmium, lead, mercury
✅ Passed Testing for Microbials**
Mold, yeast, coliform, e. Coli
✅ Passed Testing for Contaminants**
Gluten, ethylene oxide
✅ Passed Testing for Physical Properties
Moisture, color, disintegration, tap density, mesh 140, 20, and 60
**Most contaminants, heavy metals, and microbes are tested to ensure no more than 3 ppm.

Our production facility in Ogden, Utah is a GMP facility certified by NSF. We source and triple-test raw materials, make the majority of our products in-house, conduct stringent testing in our ISO-accredited lab, and distribute our own products to ensure quality and excellence in every bottle.
Disclaimer: The customer reviews and testimonials featured on this site reflect individual experiences and opinions. Results may vary and are not guaranteed. These statements have not been evaluated by the Food and Drug Administration (FDA). The content is not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare professional before starting any new supplement regimen or if you have concerns about your health.
Overall rating: 4.490196 / 5 from 51 reviews.
SmartMag Magtein ® Magnesium L-Threonate is a supplement praised for its high-quality ingredients and effectiveness in supporting brain health and function. Customers appreciate its ability to improve sleep and brain function, though some find the capsules large and difficult to swallow.
Review topics: ["quality","feel","bottle","difference","ingredients","muscles","effects","capsules","pills","supplement","magnesium","sleep","brand","function","tablets","option","mag","relaxation","vitamins","side","support"].
"everything is best in business"
— erhan b. (5/5)
"very recommended"
— Kathryn C. (5/5)
"First, the pill is a normal size and easy to swallowed. I do typically struggle to sleep at night and did notice a slight difference when taking these. I did feel slightly more relaxed without feeling jittery. It was not a huge difference, but if you are looking for something to help settle and relax you, I would recommend giving this a go after doing your own research."
— RachaelR (4/5)
"I did like these supplements. I have MS which can really cause brain fog and extreme fatigue. I did take just L-Threonate for a bit. It was recommended to me by someone in my support group. It did help me feel more awake an sharper. I started using this product to replace that. The combination of L-Threonate, Magnesium worked well. It took a bit for me to notice an improvement, but that is common for any supplement. I would recommend this product and do foresee myself keeping this in my regimen for the foreseeable future."
— BrittanyB (4/5)
"My only complaint is there is a lot of loose powder in the bottle so it’s slightly messy and makes them a little harder to swallow taste wise. Ur other than that they do what they should and they are medium sized capsules."
— TiffanyT (4/5)
"I have taken almost all of the bottle but honestly didn't notice much of a change. You also need to take multiple pills which I do not like. I didn't have any side effects and there isn't really any taste which is good. I will finish off the bottle but probably wouldn't purchase again."
— JenniferC (3/5)
"Instructions on when to take were very clear and helpful. Hard to remeber to take twice a day so had to set a reminder. Helped with brain fog and both my husband and I saw improvements. However if you are like us and didnt know magnesium can help in bowel movement. Naturally. My husband was effected more than me and he had to stop taking. Very easy to take. With no taste or after taste."
— JordanJ (4/5)
"Helps with sleep, and even keel for stress"
— Amy B. (5/5)
"These are supplements you can trust! They are clinically studied ingredients, lab verified and are vegan! It supports brain health and function. You do have to take 3 capsules a day but I’d say it’s worth it for the benefits. You take one in the morning and two at night two hours before you sleep! This does help me sleep at night which is extremely helpful. I definitely recommend this if you need help with sleep and all the benefits that it has to offer! This was complementary!"
— BaisyL (5/5)
"I used and felt the tablets were very easy to swallow one tablet daily after meals and they didn’t cause any stomach discomfort. I also felt I slept more soundly possibly because it supports brain function and improves my concentration during the day each serving provides 2 g of healthy, Ferate, magnesium, especially researched and safe form of magnesium that improves brain function so I feel reassured using it long-term for me. This is a reliable source of magnesium because it helps improve brain function and keeps me alert in a safe way."
— LukeN (5/5)
*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.