---
product_id: 263865106
title: "Source Naturals Magtein Magnesium L-Threonate Capsules (667mg, 180 Pieces)"
brand: "source naturals"
price: "₩235470"
currency: KRW
in_stock: true
url: https://www.desertcart.kr/products/263865106-source-naturals-magtein-magnesium-l-threonate-capsules-667mg-180-pieces
store_origin: KR
region: South Korea
---

# 667mg potent dose 180 capsules per pack secure, travel-ready packaging Source Naturals Magtein Magnesium L-Threonate Capsules (667mg, 180 Pieces)

**Brand:** source naturals
**Price:** ₩235470
**Availability:** ✅ In Stock

## Summary

> 🧠 Unlock your brain’s full potential with Magtein Magnesium L-Threonate!

## Quick Answers

- **What is this?** Source Naturals Magtein Magnesium L-Threonate Capsules (667mg, 180 Pieces) by source naturals
- **How much does it cost?** ₩235470 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/263865106-source-naturals-magtein-magnesium-l-threonate-capsules-667mg-180-pieces)

## 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

- • **Long-Lasting Supply:** 180 capsules ensure a 2-month supply at the recommended 3 capsules daily
- • **Trusted Brand Backing:** Source Naturals, a leader in scientifically formulated supplements
- • **Effortless Integration:** Easy-to-swallow capsules designed for daily convenience and consistent results
- • **Cognitive Clarity Boost:** 667mg of Magnesium L-Threonate for enhanced brain function and memory support
- • **Premium Quality Assurance:** Secure packaging guarantees freshness and potency with every bottle

## Overview

Magtein Magnesium L-Threonate Capsules deliver a clinically studied 667mg dose per serving to support cognitive function and memory. Each bottle contains 180 capsules, providing a convenient two-month supply with secure packaging to maintain freshness. Designed by Source Naturals, these capsules fit seamlessly into your daily wellness routine for sustained brain health.

## Description

Source Naturals Magtein Magnesium L-Threonate Capsules (667mg, 180 Pieces)

## Features

- Package include: 180 capsules
- Comes with secure packaging
- Take it as directed to enjoy the best results

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Weight | 0.54 Pounds |
| Units | 180 Count |
| Serving Recommendation | 3 Capsules |
| Brand | Source Naturals |
| Format | Capsules |

## Product Details

- **Brand:** Source Naturals
- **Item form:** Capsules
- **Primary supplement type:** Magnesium
- **Unit count:** 180 Count
- **Flavour:** Unflavored

## Images

![Source Naturals Magtein Magnesium L-Threonate Capsules (667mg, 180 Pieces) - Image 1](https://m.media-amazon.com/images/I/61K88UFg5JL.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.

## 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 South Korea*
*Store origin: KR*
*Last updated: 2026-01-28*