--- product_id: 7194707 title: "Magtein Magnesium L-Threonate, 667mg, Supports Focus, Mood, Healthy Memory, Cognitive Function - 180 Capsules" brand: "source naturals" price: "3526089β‚«" currency: VND in_stock: true reviews_count: 11 category: "Source Naturals" url: https://www.desertcart.vn/products/7194707-magtein-magnesium-l-threonate-667mg-supports-focus-mood-healthy-memory store_origin: VN region: Vietnam --- # 180 Capsules - month+ supply 667mg Magnesium L-Threonate - brain bioavailability Made in USA - cGMP & FDA compliant Magtein Magnesium L-Threonate, 667mg, Supports Focus, Mood, Healthy Memory, Cognitive Function - 180 Capsules **Brand:** source naturals **Price:** 3526089β‚« **Availability:** βœ… In Stock ## Summary > 🧩 Elevate your brain game β€” because your mind deserves the premium edge. ## Quick Answers - **What is this?** Magtein Magnesium L-Threonate, 667mg, Supports Focus, Mood, Healthy Memory, Cognitive Function - 180 Capsules by source naturals - **How much does it cost?** 3526089β‚« with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/7194707-magtein-magnesium-l-threonate-667mg-supports-focus-mood-healthy-memory) ## Best For - source naturals enthusiasts ## Why This Product - Trusted source naturals brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Pure, Trusted Quality:** Crafted in the USA under strict cGMP standards by Source Naturals, a 40+ year wellness pioneer. - β€’ **Deep, Restorative Sleep:** Supports improved sleep quality for waking up refreshed and ready to lead. - β€’ **Stress-Resilient Mindset:** Boosts resilience to daily stress while elevating mood and energy levels to power through your busiest days. - β€’ **Clean & Allergen-Free Formula:** Dairy, gluten, soy, egg, and wheat freeβ€”perfect for mindful, health-conscious professionals. - β€’ **Unlock Peak Cognitive Performance:** Clinically shown to enhance memory, focus, and executive function for sharper decision-making. ## Overview Source Naturals Magtein Magnesium L-Threonate delivers 667mg of a unique, brain-penetrating magnesium form per capsule, scientifically linked to enhanced memory, focus, mood, and sleep quality. With 180 capsules per bottle, it offers a convenient, allergen-free daily regimen manufactured in the USA under FDA-compliant cGMP standards. Trusted for over 40 years, this supplement is designed for professionals seeking cognitive resilience and mental clarity in a demanding world. ## Description Buy Source Naturals Magtein Magnesium L-Threonate, 667mg, Supports Focus, Mood, Healthy Memory, Cognitive Function - 180 Capsules on desertcart.com βœ“ FREE SHIPPING on qualified orders Review: I can't argue with success. - As is noted above, Magnesium L-threonate penetrates the blood-brain barrier, and hence it can purportedly support cognitive function and brain health. This makes the magnesium in magtein distinct from many others on the market, including magnesium oxide (poor bioavailability), as well as magnesium chloride, lactate, and aspartate, which have better bioavailability but which also don't penetrate the blood-brain barrier. Magnesium is an important part of everyone's diet, but corporate farming methods have depleted its presence in soil, and hence, in our diets. It appears somewhere from 60-80% of Americans are deficient in magnesium, and low magnesium levels are associated with a variety of conditions, including hypertension and heart disease, type 2 diabetes, osteoporosis, and migraine headaches, among others. We landed upon magnesium l-threonate because magnesium is noted to have calming properties. Our son is a bit hyper - so after finding out about the benefits of magnesium, we found out about l-threonate and then researched different brands. On a weighted assessment, Megtein is the cheapest l-threonate product currently on the market, so our decision was pretty easy. I can't say if it was a coincidence, but shortly after starting on the Magtein, my son's reports from school improved dramatically. He was more focused, and his classroom performance improved correspondingly. He went from being the kid the teacher dreaded to being one she obviously, really liked. It was a stunning turn-around. The pills aren't huge, and he has no problem swallowing them. Was it solely due to the Magtein? I can't say - we also started him on probiotics, and we gave him a good vitamin K and D supplement as well, but something has changed. And I'm not going to mess with success, so he'll be on the Magtein for a while. I've been taking the Magtein as well - I can say it causes me to have more dreams and deeper, more restful sleep than I've had previously. In all, I'm a huge Magtein fan, and will remain so. Review: I began to feel this comforting sense of peace and joy. Since I have some genetic issues with absorbing ... - I have been taking Magtein for several months. After just a few days, I began to feel this comforting sense of peace and joy. Since I have some genetic issues with absorbing folate, I have been taking numerous supplements for years to treat a number of conditions. Hence, I am already on some of the vitamins and minerals that should be taken with Magnesium. Especially, B6 and D3. Off and on over the years I would take Magnesium to treat restless legs, but it was only sporadic and not l-threonate. Knowing there is a strong family history of dementia, I decided to switch to Magtein in the hopes that it might delay the onset of Alzheimer's. Not for one minute do I believe this will be a miracle cure, but it might be part of a larger arsenal of preventative measures. Regardless, this is now one of the top 5 things I have discovered to improve my daily life with lessened anxiety and heightened clarity of thought and deeper sleep. I recommended this to my adult son and he promptly hijacked my bottle for himself! I am making him pay me back. He has suffered from anxiety for over a decade and cannot tolerate the side effects of numerous anti-anxiety prescriptions. After taking this, he reports his anxiety has lessened a great deal and that his wife is grateful. He also reports that he had been experiencing brain fog and had begun slurring some of his words. Those two things are now better. This is the first medication/supplement he has tried that he has wanted to keep taking other than a multivitamin. We are waiting to see how this affects my mother who is in the middle stages of Alzheimer's. I am hopeful that it will also ease her anxiety and I don't have any unrealistic expectations that it will treat her dementia. But, if it does . . . wouldn't that be great! Alas, anything that will help keep her calm is a good thing. She has had very bad reactions to prescriptions in the past and refuses anything "for her brain." We can open the capsule and mix the powder into her food if she refuses it in pill form. We have only been using this for a week and just one a day, so too early to report. ## Features - MAGTEIN BENEFITS. Known to increase resilience to stress, lift mood, raise your energy levels, improve concentration and focus and reformation of sleep quality. - BENEFITS COGNITIVE ABILITY. There are 4 aspects of cognitive ability that they were positively effected by taking Magtein, episodic memory, working memory, executive function, and attention. - EXCELLENT SOURCE OF MAGNESIUM L THREONATE. There are countless ways to get other forms of magnesium naturally in your diet, but food sources of magnesium L threonate do not exist because it’s a synthesized form. - OVER 40 YEARS OF TRUST. Source Naturals was created in 1982 by CEO Ira Goldberg to support each individual's potential to enjoy optimal health. - MANUFACTURED IN THE USA. Manufactured in Scotts Valley, CA, under the Good Manufacturing Practices (cGMPs) established by the US Food and Drug Administration. (FDA) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00AXTO30G | | ASIN | B00AXTO30G | | Age Range Description | Adult | | Allergen Information | Dairy Free, Egg Free, Gluten Free, Soy Free, Wheat Free | | Best Sellers Rank | #23,075 in Health & Household ( See Top 100 in Health & Household ) #444 in Magnesium Mineral Supplements #1,832 in Sales & Deals | | Brand Name | Source Naturals | | Customer Reviews | 4.6 4.6 out of 5 stars (1,447) | | Date First Available | January 7, 2013 | | Flavor | Unflavored | | Is Discontinued By Manufacturer | No | | Item Form | Capsules | | Item Nype Name | Magnesium | | Item Weight | 0.1 Pounds | | Item model number | SN2486 | | Manufacturer | Source Naturals | | Manufacturer | Source Naturals | | Manufacturer Part Number | SN2486 | | Material Type Free | Dairy Free, Egg Free, Gluten Free, Soy Free, Wheat Free | | Model Number | SN2486 | | Number of Items | 1 | | Primary Supplement Type | Magnesium | | Product Benefits | for Learning and Memory | | Product Dimensions | 1.3 x 1.3 x 1.6 inches; 1.6 ounces | | UPC | 021078024866 | | Unit Count | 180.0 Count | ## Product Details - **Brand:** Source Naturals - **Flavor:** Unflavored - **Item Form:** Capsules - **Primary Supplement Type:** Magnesium - **Unit Count:** 180.0 Count ## Images ![Magtein Magnesium L-Threonate, 667mg, Supports Focus, Mood, Healthy Memory, Cognitive Function - 180 Capsules - Image 1](https://m.media-amazon.com/images/I/61K88UFg5JL.jpg) ## Available Options This product comes in different **Size, Flavor** options. ## Questions & Answers **Q: 3 capsules contain 2 gm magnesium l-threonate and 144 mg of magnesium. How much L-threonate is this? Product label says nothing.** A: Hi... The l-threonate is just a metabolite (salt) of vitamin C that is bound to the magnesium as a chelation agent to supposedly make the magnesium more bioavailable, particularly in the brain. It's not a substance that acts independently, or is counted independently, of the magnesium. It takes 2 gm of magnesium l-threonate to get 144 mg of actual elemental magnesium, such as you might find in more commonplace magnesium supplements... it's just that binding the magnesium with a chelation agent (in this case l-threonate) may make each mg of magnesium more bioavailable (esp in the brain), than larger amounts of regular magnesium. Wonder if you're thinking of, and maybe looking for, l-theanine? That's a totally different substance (supposed to provide a relaxed alertness) from green tea. If that's what you want, it is available as its own thing. **Q: why does my bottle show Maltodextrin in the "other ingredients" but on the website label it does not show it? I bought this based on the ingredients.** A: This problem needs to be addressed and not pawned off. The June/July2016 reviews have a higher level of complaints. Update the photos if the manufacturer has changed ingredients! **Q: why 2000 mg in some and 645 mg in others** A: 2000 mg of magnesium threonate will yield 144 mg of elemental magnesium. This seems to be the recommended daily dosage. Three capsules, each containing 645 mg of magnesium threonate will be needed to give a daily dosage of 1935 mg (which is the same as 2000 mg within rounding error). But some brands use two larger capsules to provide the recommended daily dosage and these may be harder to swallow for some people. **Q: Is it best to take with food or on empty stomach?** A: Best on an empty stomach. I take 2 am and 1 pm. Directions are 3 per day with 1 taken a few hours before bedtime and 2 taken during the day. I read that magnesium absorbs best on an empty stomach and some supplement instructions recommend taking that way also. ## Customer Reviews ### ⭐⭐⭐⭐⭐ I can't argue with success. *by B***T on December 16, 2014* As is noted above, Magnesium L-threonate penetrates the blood-brain barrier, and hence it can purportedly support cognitive function and brain health. This makes the magnesium in magtein distinct from many others on the market, including magnesium oxide (poor bioavailability), as well as magnesium chloride, lactate, and aspartate, which have better bioavailability but which also don't penetrate the blood-brain barrier. Magnesium is an important part of everyone's diet, but corporate farming methods have depleted its presence in soil, and hence, in our diets. It appears somewhere from 60-80% of Americans are deficient in magnesium, and low magnesium levels are associated with a variety of conditions, including hypertension and heart disease, type 2 diabetes, osteoporosis, and migraine headaches, among others. We landed upon magnesium l-threonate because magnesium is noted to have calming properties. Our son is a bit hyper - so after finding out about the benefits of magnesium, we found out about l-threonate and then researched different brands. On a weighted assessment, Megtein is the cheapest l-threonate product currently on the market, so our decision was pretty easy. I can't say if it was a coincidence, but shortly after starting on the Magtein, my son's reports from school improved dramatically. He was more focused, and his classroom performance improved correspondingly. He went from being the kid the teacher dreaded to being one she obviously, really liked. It was a stunning turn-around. The pills aren't huge, and he has no problem swallowing them. Was it solely due to the Magtein? I can't say - we also started him on probiotics, and we gave him a good vitamin K and D supplement as well, but something has changed. And I'm not going to mess with success, so he'll be on the Magtein for a while. I've been taking the Magtein as well - I can say it causes me to have more dreams and deeper, more restful sleep than I've had previously. In all, I'm a huge Magtein fan, and will remain so. ### ⭐⭐⭐⭐⭐ I began to feel this comforting sense of peace and joy. Since I have some genetic issues with absorbing ... *by T***N on October 13, 2015* I have been taking Magtein for several months. After just a few days, I began to feel this comforting sense of peace and joy. Since I have some genetic issues with absorbing folate, I have been taking numerous supplements for years to treat a number of conditions. Hence, I am already on some of the vitamins and minerals that should be taken with Magnesium. Especially, B6 and D3. Off and on over the years I would take Magnesium to treat restless legs, but it was only sporadic and not l-threonate. Knowing there is a strong family history of dementia, I decided to switch to Magtein in the hopes that it might delay the onset of Alzheimer's. Not for one minute do I believe this will be a miracle cure, but it might be part of a larger arsenal of preventative measures. Regardless, this is now one of the top 5 things I have discovered to improve my daily life with lessened anxiety and heightened clarity of thought and deeper sleep. I recommended this to my adult son and he promptly hijacked my bottle for himself! I am making him pay me back. He has suffered from anxiety for over a decade and cannot tolerate the side effects of numerous anti-anxiety prescriptions. After taking this, he reports his anxiety has lessened a great deal and that his wife is grateful. He also reports that he had been experiencing brain fog and had begun slurring some of his words. Those two things are now better. This is the first medication/supplement he has tried that he has wanted to keep taking other than a multivitamin. We are waiting to see how this affects my mother who is in the middle stages of Alzheimer's. I am hopeful that it will also ease her anxiety and I don't have any unrealistic expectations that it will treat her dementia. But, if it does . . . wouldn't that be great! Alas, anything that will help keep her calm is a good thing. She has had very bad reactions to prescriptions in the past and refuses anything "for her brain." We can open the capsule and mix the powder into her food if she refuses it in pill form. We have only been using this for a week and just one a day, so too early to report. ### ⭐⭐⭐⭐⭐ Excellent Product. After much research, this rose to the top. *by S***L on July 11, 2025* Excellent Product. After much research, this rose to the top. ## Frequently Bought Together - Source Naturals Magtein Magnesium L-Threonate, 667mg, Supports Focus, Mood, Healthy Memory, Cognitive Function - 180 Capsules - SlowMag Muscle + Heart Magnesium Chloride with Calcium Supplement to Support Muscle Relaxation, Occasional Muscle Cramping & Heart Health, High Absorption, 180 Count - Jarrow Formulas Extra Strength Methyl B-12 1000 mcg & Methyl Folate 400 mcg + P-5-P, Dietary Supplement for Cellular Energy Metabolism and Cardiovascular Support, 100 Chewable Tablets, 100 Day Supply --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vn/products/7194707-magtein-magnesium-l-threonate-667mg-supports-focus-mood-healthy-memory](https://www.desertcart.vn/products/7194707-magtein-magnesium-l-threonate-667mg-supports-focus-mood-healthy-memory) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-05-20*