---
product_id: 739660770
title: "Magtein: 26.3 oz (667 mg) 180 Caps"
brand: "ソースナチュラルズ(source naturals)"
price: "463 Lei"
currency: RON
in_stock: true
reviews_count: 4
category: "ソースナチュラルズ(Source Naturals)"
url: https://www.desertcart.ro/products/739660770-magtein-26-3-oz-667-mg-180-caps
store_origin: RO
region: Romania
---

# Free from gluten, dairy, soy & preservatives 180 easy-to-swallow capsules 667 mg Magtein per serving Magtein: 26.3 oz (667 mg) 180 Caps

**Brand:** ソースナチュラルズ(source naturals)
**Price:** 463 Lei
**Availability:** ✅ In Stock

## Summary

> 🧠 Elevate your mind, stay sharp, and never miss a mental beat!

## Quick Answers

- **What is this?** Magtein: 26.3 oz (667 mg) 180 Caps by ソースナチュラルズ(source naturals)
- **How much does it cost?** 463 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/739660770-magtein-26-3-oz-667-mg-180-caps)

## Best For

- ソースナチュラルズ(source naturals) enthusiasts

## Why This Product

- Trusted ソースナチュラルズ(source naturals) brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted Quality:** Source Naturals brand with 4.5-star rating from 1,373 reviews
- • **Long-Lasting Supply:** 180 capsules to keep your mental edge for months
- • **Clean & Pure Formula:** No gluten, dairy, soy, yeast, or synthetic additives—pure brain fuel
- • **Optimized Absorption:** Magnesium combined with L-threonic acid for superior uptake
- • **Brain-Boosting Magnesium:** 667 mg of bioavailable Magtein for enhanced cognitive support

## Overview

Magtein by Source Naturals delivers 667 mg of magnesium L-threonate per capsule, a patented form designed for superior brain absorption. With 180 capsules per bottle, this gluten-free, dairy-free, and preservative-free supplement supports cognitive health and mental clarity, trusted by over a thousand users with a 4.5-star rating.

## Description

Product description Magtein is a magnesium compound that combines magnesium with L-treonic acid. The L-Threonate magnesium compound is a special form of magnesium that is easier to use in the body than other magnesium compounds. Ingredients Magtein, Gelatin Capsules, Maltodextrin, Magnesium Stearate, Silica Products are free of yeast, dairy, egg, gluten, soy, and wheat. No preservatives, synthetic colors or fragrances

Review: 脳の健康のために - 毎日欠かさず飲んでいます。 安心感があります。 ありがとうございました。
Review: 脳に効いてると思う - メンタルの改善を目的にマグテインを購入しました。 目的の効果とは違いますが、不思議と漢字が書けるようになりました。もともと漢字を書くのが苦手で、読めるけど書けない、なんとなくは解るんだけど書けない、みたいな感じだったのですが、マグテインを飲むようになってから不思議と漢字が書けるようになって驚きました。脳に効いているんだと思います。

## Features

- This is a pioneer brand that develops supplements by combining nutrients, herbs, and nutrition supplements. We offer a wide variety of supplements to support your body in a durable form
- Our store has our own maximum order price to avoid the trouble of customs incident. Please be aware that orders that have a total product cost over 16,000 yen before use the Points Coupon may be cancelled. Please note that we do not accept import permission for orders exceeding 22.0 lbs (10 kg)
- Purchasing from our store is personal imported, and the customer's personal address and name (full name) are required when processing customs at Japan Customs. Please note that company name or company address cannot be used

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00AXTO30G |
| Age Range Description | 35年 |
| Amazon Bestseller | #30,853 in Health & Personal Care ( See Top 100 in Health & Personal Care ) #122 in Blended Vitamin & Mineral Supplements |
| Brand | ソースナチュラルズ(Source Naturals) |
| Brand Name | ソースナチュラルズ(Source Naturals) |
| Customer Reviews | 4.5 out of 5 stars 1,373 Your Review |
| Item Form | Capsule |
| Item Height | 1.6 inches |
| Item Weight | 0.1 Pounds |
| Manufacturer | Source Naturals |
| Number of Items | 1 |
| Primary Supplement Type | Magnesium |
| UPC | 021078024866 |
| Unit Count | 180 粒 |

## Product Details

- **Brand:** ソースナチュラルズ(Source Naturals)
- **Item Form:** Capsule
- **Primary Supplement Type:** Magnesium
- **Unit Count:** 180 粒
- **Number of Items:** 1
- **Item Weight:** 45 g
- **Age Range (Description):** 35年
- **Manufacturer:** Source Naturals
- **UPC:** 021078024866

## Images

![Magtein: 26.3 oz (667 mg) 180 Caps - Image 1](https://m.media-amazon.com/images/I/61K88UFg5JL.jpg)
![Magtein: 26.3 oz (667 mg) 180 Caps - Image 2](https://m.media-amazon.com/images/I/61OzEpbNtiL.jpg)
![Magtein: 26.3 oz (667 mg) 180 Caps - Image 3](https://m.media-amazon.com/images/I/71MKf9usJZL.jpg)
![Magtein: 26.3 oz (667 mg) 180 Caps - Image 4](https://m.media-amazon.com/images/I/71QVOtkcFVL.jpg)
![Magtein: 26.3 oz (667 mg) 180 Caps - Image 5](https://m.media-amazon.com/images/I/71UM6N62PHL.jpg)

## 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

### ⭐⭐⭐⭐⭐ 脳の健康のために
*by 香***子 on May 26, 2025*

毎日欠かさず飲んでいます。 安心感があります。 ありがとうございました。

### ⭐⭐⭐⭐⭐ 脳に効いてると思う
*by お***る on December 15, 2022*

メンタルの改善を目的にマグテインを購入しました。 目的の効果とは違いますが、不思議と漢字が書けるようになりました。もともと漢字を書くのが苦手で、読めるけど書けない、なんとなくは解るんだけど書けない、みたいな感じだったのですが、マグテインを飲むようになってから不思議と漢字が書けるようになって驚きました。脳に効いているんだと思います。

### ⭐⭐⭐⭐ Magtein
*by H***S on December 2, 2022*

2nd order came in and not too sure if the daily dosage is showing any results. Hopefully we'll find out in couple of more weeks.

## Frequently Bought Together

- Source Naturals Magtein Magnesium L-Threonate, 667mg, Supports Focus, Mood, Healthy Memory, Cognitive Function - 180 Capsules
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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-01-26*