---
product_id: 7194708
title: "Source Naturals, Magtein Magnesium L-Threonate 667mg - 90 Capsules | Helps Support Learning And Memory"
brand: "source naturals"
price: "¥9995"
currency: JPY
in_stock: true
category: "Source Naturals"
url: https://www.desertcart.jp/products/7194708-source-naturals-magtein-magnesium-l-threonate-667mg-90-capsules-helps
store_origin: JP
region: Japan
---

# Supports memory & cognitive longevity 667mg Magnesium L-Threonate for brain boost Made in USA, cGMP & FDA compliant Source Naturals, Magtein Magnesium L-Threonate 667mg - 90 Capsules | Helps Support Learning And Memory

**Brand:** source naturals
**Price:** ¥9995
**Availability:** ✅ In Stock

## Summary

> 🧩 Elevate your brain game — because your mind deserves the premium edge.

## Quick Answers

- **What is this?** Source Naturals, Magtein Magnesium L-Threonate 667mg - 90 Capsules | Helps Support Learning And Memory by source naturals
- **How much does it cost?** ¥9995 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/7194708-source-naturals-magtein-magnesium-l-threonate-667mg-90-capsules-helps)

## 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:** Boosts mood and energy while promoting restful, restorative sleep.
- • **Clean, Pure & Transparent:** Soy, dairy, egg, preservative, and yeast free; crafted under strict US manufacturing standards.
- • **Trusted Legacy Since 1982:** Over 40 years of science-driven wellness from Source Naturals.
- • **Exclusive Magnesium L-Threonate:** Unique synthesized form not found in food, optimized for brain absorption.
- • **Unlock Peak Cognitive Performance:** Clinically-backed 667mg dose enhances focus, memory, and executive function.

## Overview

Source Naturals Magtein Magnesium L-Threonate delivers a potent 667mg dose of a unique, brain-optimized magnesium form designed to enhance memory, focus, mood, and sleep quality. Manufactured in the USA under FDA cGMP standards, this supplement supports cognitive resilience and mental clarity, backed by over 40 years of trusted health innovation.

## 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 |
| ASIN  | B00B7ZNR52 |
| Age Range Description | 35 years |
| Allergen Information | Soy Free |
| Best Sellers Rank | #25,821 in Health & Household ( See Top 100 in Health & Household ) #520 in Magnesium Mineral Supplements #1,900 in Sales & Deals |
| Brand Name | Source Naturals |
| Concentration | 667 Mg |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,873) |
| Date First Available  | January 30, 2013 |
| Flavor | Unflavored |
| Item Form | Capsule |
| Item Nype Name | Magnesium |
| Item Weight | 1.6 ounces |
| Item model number  | SN2485 |
| Manufacturer | Source Naturals |
| 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 |
| Product Dimensions  | 1.3 x 1.3 x 1.6 inches; 1.6 ounces |
| 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 | Helps Support Learning And Memory - Image 1](https://m.media-amazon.com/images/I/71CWSQLqM1L.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.jp/products/7194708-source-naturals-magtein-magnesium-l-threonate-667mg-90-capsules-helps](https://www.desertcart.jp/products/7194708-source-naturals-magtein-magnesium-l-threonate-667mg-90-capsules-helps)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-09-06*