--- product_id: 7194708 title: "Source Naturals, Magtein Magnesium L-Threonate 667mg - 90 Capsules" brand: "source naturals" price: "R1269" currency: ZAR in_stock: true reviews_count: 11 category: "Source Naturals" url: https://www.desertcart.co.za/products/7194708-source-naturals-magtein-magnesium-l-threonate-667mg-90-capsules store_origin: ZA region: South Africa --- # Enhances focus & energy 667mg Magtein for brain boost Made in USA, cGMP certified Source Naturals, Magtein Magnesium L-Threonate 667mg - 90 Capsules **Brand:** source naturals **Price:** R1269 **Availability:** ✅ In Stock ## Summary > 🧠 Elevate your mind, own your day — the smart magnesium upgrade! ## Quick Answers - **What is this?** Source Naturals, Magtein Magnesium L-Threonate 667mg - 90 Capsules by source naturals - **How much does it cost?** R1269 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/7194708-source-naturals-magtein-magnesium-l-threonate-667mg-90-capsules) ## 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 - • **Sleep Like a Pro:** Promotes deep, restful sleep to recharge your mind and body - • **Sharper Memory & Focus:** Improves episodic memory, working memory, executive function, and attention - • **Neuro-Boosting Magnesium:** 667mg of patented Magtein L-Threonate for superior cognitive support - • **Stress & Mood Resilience:** Clinically shown to reduce anxiety and elevate mood for daily calm - • **Trusted Quality Since 1982:** Crafted in the USA under strict FDA cGMP standards for purity and potency ## Overview Source Naturals Magtein Magnesium L-Threonate delivers 667mg of a unique, brain-penetrating magnesium form clinically proven to enhance memory, focus, mood, and sleep quality. Manufactured in the USA under FDA cGMP guidelines, this supplement supports cognitive resilience and mental clarity, making it a must-have for professionals seeking a competitive edge in mental performance. ## Description Buy Source Naturals, Magtein Magnesium L-Threonate 667mg - 90 Capsules | Helps Support Learning And Memory on desertcart.com ✓ FREE SHIPPING on qualified orders 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. Review: Why’s MAGNESIUM not WORSHIPPED⁉️ - This is incredibly effective at getting DEEP & ☺️ RESTFUL & 😌 RE-CHARGING 🔋 💤 Sleep!💤 ## 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 everyone’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 | B00B7ZNR52 | | Age Range Description | 35 years | | Allergen Information | Soy Free | | Best Sellers Rank | #27,099 in Health & Household ( See Top 100 in Health & Household ) #544 in Magnesium Mineral Supplements #1,946 in Sales & Deals | | Brand | Source Naturals | | Brand Name | Source Naturals | | Concentration | 667 Mg | | Customer Reviews | 4.6 out of 5 stars 1,875 Reviews | | Flavor | Unflavored | | Item Form | Capsule | | Item Nype Name | Magnesium | | Item Weight | 1.6 ounces | | Manufacturer | Source Naturals | | Manufacturer Part Number | SN2485 | | Material Type Free | Dairy Free, Egg Free, Preservative Free, Yeast Free | | Model Number | SN2485 | | Number of Items | 1 | | Primary Supplement Type | Magnesium | | Product Benefits | Brain Health | | UPC | 021078024859 | | Unit Count | 90 Count | ## Product Details - **Brand:** Source Naturals - **Flavor:** Unflavored - **Item Form:** Capsule - **Primary Supplement Type:** Magnesium - **Unit Count:** 90 Count ## Images ![Source Naturals, Magtein Magnesium L-Threonate 667mg - 90 Capsules - Image 1](https://m.media-amazon.com/images/I/71CWSQLqM1L.jpg) ![Source Naturals, Magtein Magnesium L-Threonate 667mg - 90 Capsules - Image 2](https://m.media-amazon.com/images/I/711GXaA80zL.jpg) ![Source Naturals, Magtein Magnesium L-Threonate 667mg - 90 Capsules - Image 3](https://m.media-amazon.com/images/I/71KUaTHnDyL.jpg) ![Source Naturals, Magtein Magnesium L-Threonate 667mg - 90 Capsules - Image 4](https://m.media-amazon.com/images/I/61NoDEfH0+L.jpg) ![Source Naturals, Magtein Magnesium L-Threonate 667mg - 90 Capsules - Image 5](https://m.media-amazon.com/images/I/71QVOtkcFVL.jpg) ## Available Options This product comes in different **Size, Flavor** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ 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. ### ⭐⭐⭐⭐⭐ Why’s MAGNESIUM not WORSHIPPED⁉️ *by A***X on July 8, 2026* This is incredibly effective at getting DEEP & ☺️ RESTFUL & 😌 RE-CHARGING 🔋 💤 Sleep!💤 ### ⭐⭐⭐⭐⭐ Some nice surprises, great product *by K***E on October 21, 2024* So, you try a supplement which is supposed to help your brain and your memory, but you know in the back of your mind that it won’t. But guess what? This one did! I started remembering things I forgot that I knew. Even little details! I was taking it for about three months when it dawned on me that I was having this memory recall. Definitely worth buying. As an added bonus, it helps keep your digestion regular because it’s magnesium. ## Frequently Bought Together - Source Naturals Magtein Magnesium L-Threonate 667mg Supports Focus, Mood, Healthy Memory, Cognitive Function, Sleep* - 90 Capsules - Pure Encapsulations Magnesium (Glycinate) - Supplement to Support Stress Relief, Sleep, Heart Health, Nerves, Muscles, and Metabolism* - with Magnesium Glycinate - 90 Capsules - Sports Research Triple Strength Omega 3 Fish Oil - Burpless Fish Oil Supplement w/EPA & DHA Fatty Acids from Single-Source Wild Alaskan Pollock - 1250 mg, 90 ct --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/7194708-source-naturals-magtein-magnesium-l-threonate-667mg-90-capsules](https://www.desertcart.co.za/products/7194708-source-naturals-magtein-magnesium-l-threonate-667mg-90-capsules) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-09-14*