--- product_id: 7194708 title: "Source Naturals, Magtein Magnesium L-Threonate 667mg - 90 Capsules" brand: "source naturals" price: "€ 64.85" currency: EUR in_stock: true category: "Source Naturals" url: https://www.desertcart.sk/products/7194708-source-naturals-magtein-magnesium-l-threonate-667mg-90-capsules store_origin: SK region: Slovakia --- # 4.6⭐ from 1,877 reviews 667mg Magtein for brain boost Made in USA, cGMP certified Source Naturals, Magtein Magnesium L-Threonate 667mg - 90 Capsules **Brand:** source naturals **Price:** € 64.85 **Availability:** ✅ In Stock ## Summary > 🧠 Elevate your brain game — because your mind deserves the best! ## Quick Answers - **What is this?** Source Naturals, Magtein Magnesium L-Threonate 667mg - 90 Capsules by source naturals - **How much does it cost?** € 64.85 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/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 - • **Stress-Resilient Mindset:** Enhances resilience to stress and elevates mood to keep you balanced under pressure. - • **Trusted Quality Since 1982:** Backed by 40+ years of Source Naturals’ commitment to optimal health. - • **Clean, Pure & Allergen-Free:** Soy, dairy, egg, yeast, and preservative free for a clean supplement experience. - • **Unlock Peak Cognitive Performance:** Supports memory, focus, and executive function for next-level productivity. - • **Scientifically Synthesized Magnesium L-Threonate:** Unique form not found in food, designed for superior brain absorption. ## Overview Source Naturals Magtein Magnesium L-Threonate delivers 667mg of a patented magnesium form clinically shown to enhance memory, focus, and cognitive function. Manufactured in the USA under strict cGMP standards, this supplement supports stress resilience and sleep quality, backed by over 40 years of trusted health innovation. With 90 unflavored capsules and a 4.6-star rating from nearly 2,000 users, it’s the smart choice for professionals aiming to optimize brain health. ## Description Buy Source Naturals, Magtein Magnesium L-Threonate 667mg - 90 Capsules | Helps Support Learning And Memory on desertcart.com ✓ FREE SHIPPING on qualified orders ## 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 | #26,635 in Health & Household ( See Top 100 in Health & Household ) #538 in Magnesium Mineral Supplements #1,936 in Sales & Deals | | Brand | Source Naturals | | Brand Name | Source Naturals | | Concentration | 667 Mg | | Customer Reviews | 4.6 out of 5 stars 1,877 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. ## 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.sk/products/7194708-source-naturals-magtein-magnesium-l-threonate-667mg-90-capsules](https://www.desertcart.sk/products/7194708-source-naturals-magtein-magnesium-l-threonate-667mg-90-capsules) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-09-18*