---
product_id: 451295590
title: "Momentous Magtein Magnesium L-Threonate - Brain & Rest Support Supplement - Boosts Cognitive Function & Sleep Quality - NSF Certified for Sport -145 mg - 30 Servings"
brand: "momentous"
price: "¥16367"
currency: JPY
in_stock: true
reviews_count: 10
category: "Momentous"
url: https://www.desertcart.jp/products/451295590-momentous-magtein-magnesium-l-threonate-brain-and-rest-support-supplement
store_origin: JP
region: Japan
---

# NSF Certified for Sport-grade purity Supports deep, restorative sleep 145 mg brain-penetrating Magtein Momentous Magtein Magnesium L-Threonate - Brain & Rest Support Supplement - Boosts Cognitive Function & Sleep Quality - NSF Certified for Sport -145 mg - 30 Servings

**Brand:** momentous
**Price:** ¥16367
**Availability:** ✅ In Stock

## Summary

> 🧩 Elevate your mind & rest—because your brain deserves the best!

## Quick Answers

- **What is this?** Momentous Magtein Magnesium L-Threonate - Brain & Rest Support Supplement - Boosts Cognitive Function & Sleep Quality - NSF Certified for Sport -145 mg - 30 Servings by momentous
- **How much does it cost?** ¥16367 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/451295590-momentous-magtein-magnesium-l-threonate-brain-and-rest-support-supplement)

## Best For

- momentous enthusiasts

## Why This Product

- Trusted momentous brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Sleep Like a Pro:** Clinically shown to cross the blood-brain barrier, enhancing quality rest and recovery.
- • **Athlete-Approved Purity:** NSF Certified ensures clean, trusted supplementation for high performers.
- • **Multi-Functional Magnesium:** Supports muscle function, nerve signaling, and cellular energy production for holistic wellness.
- • **Unlock Peak Cognitive Power:** Magnesium L-Threonate boosts memory, focus & learning for next-level brain performance.
- • **Optimized Dosage for Results:** 3 capsules before bed to wake up sharp, energized, and ready to conquer your day.

## Overview

Momentous Magtein Magnesium L-Threonate delivers 145 mg of a unique magnesium form clinically proven to cross the blood-brain barrier, enhancing cognitive function and sleep quality. NSF Certified for Sport, this supplement supports memory, focus, muscle function, and restful recovery with a precise, research-backed dosage of 3 capsules per night, making it a trusted choice for professionals and athletes alike.

## Description

Buy Momentous Magtein Magnesium L-Threonate - Brain & Rest Support Supplement - Boosts Cognitive Function & Sleep Quality - NSF Certified for Sport -145 mg - 30 Servings on desertcart.com ✓ FREE SHIPPING on qualified orders

Review: Finally, a good night's rest without feeling tired in the morning. - Superior quality and works great.
Review: Quality of product is essential. - Excellent product. Difference in sleep quality and depth has made this product exceptional value for me. Top rated company.

## Features

- Elevates Cognitive Function - Harness the power of magnesium L-threonate to help increase magnesium levels in the brain, which may promote overall brain health. Our powerful formula supports cognitive function including memory, learning, attention, & focus.
- Promotes Quality Rest - Unlock the unique capability of Magtein magnesium L-threonate, the only form of magnesium demonstrated to penetrate the blood-brain barrier. By increasing blood flow to the brain, it supports quality rest for optimal recovery during sleep.
- Enhances Function - Momentous magnesium L-threonate supplements help to facilitate muscle contraction, regulate blood pressure, & synthesize DNA & proteins. They also aid in the transmission of nerve signals, regulate neurotransmitter levels, & fuel energy production in brain cells.
- Optimal Dosage, Optimal Results - In order to harness the full benefits of our magnesium L-threonate supplement, take 3 capsules 30-60 minutes before bedtime to promote restful sleep & energize the next day’s daily demands & activities.
- Certified for Athletes - Providing products that give you peace of mind knowing that you’re making smart choices. High quality, research-backed ingredients, chosen by our world-class product engineers.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09WWK4R2C |
| ASIN  | B09WWK4R2C |
| Age Range Description | Adult |
| Best Sellers Rank | #5,130 in Health & Household ( See Top 100 in Health & Household ) #111 in Magnesium Mineral Supplements |
| Brand Name | Momentous |
| Customer Reviews | 4.6 4.6 out of 5 stars (616) |
| Date First Available  | March 30, 2022 |
| Department  | All Ages, Unisex |
| Flavor | Unflavored |
| Global Trade Identification Number | 00850030796042 |
| Item Form | Capsule |
| Manufacturer | Momentous |
| Manufacturer  | Momentous |
| Number of Items | 1 |
| Package Dimensions  | 4.09 x 2.28 x 2.24 inches; 4.16 ounces |
| Primary Supplement Type | Magnesium |
| UPC | 850030796042 |
| Unit Count | 30.0 Count |

## Product Details

- **Brand:** Momentous
- **Flavor:** Unflavored
- **Item Form:** Capsule
- **Primary Supplement Type:** Magnesium
- **Unit Count:** 30.0 Count

## Images

![Momentous Magtein Magnesium L-Threonate - Brain & Rest Support Supplement - Boosts Cognitive Function & Sleep Quality - NSF Certified for Sport -145 mg - 30 Servings - Image 1](https://m.media-amazon.com/images/I/711HhZ3O6uL.jpg)

## Questions & Answers

**Q: Can Magnesium L-Threonate help with sleep?**
A: Yes, Magnesium L-Threonate can support healthy sleep patterns. It promotes relaxation and helps regulate neurotransmitters, which can improve sleep quality and duration.

**Q: When is the best time to take Magnesium L-Threonate for sleep?**
A: It is generally recommended to take Magnesium L-Threonate in the evening 30-60 minutes before bed. This allows the supplement to promote relaxation and support a restful night's sleep.

**Q: How long does it take for Magnesium L-Threonate to improve sleep quality?**
A: The time it takes to notice improvements in sleep quality can vary. Some may experience benefits within a few weeks of consistent use, while others may require more time. It is important to be patient and allow it to build up in your system.

**Q: Are there any side effects of taking Magnesium L-Threonate for sleep?**
A: Magnesium L-Threonate is generally well tolerated. However, high doses may cause digestive discomfort, such as diarrhea or stomach cramps. It is recommended to start with the recommended dosage and adjust as needed based on individual tolerance.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Finally, a good night's rest without feeling tired in the morning.
*by L***E on January 20, 2026*

Superior quality and works great.

### ⭐⭐⭐⭐⭐ Quality of product is essential.
*by M***T on February 23, 2026*

Excellent product. Difference in sleep quality and depth has made this product exceptional value for me. Top rated company.

### ⭐⭐⭐⭐⭐ Sleep supplement
*by D***E on February 27, 2026*

I’ve been taking this for about a month and I have noticed an improvement in my sleep.

## Frequently Bought Together

- Momentous Magtein Magnesium L-Threonate 145mg - Magnesium Threonate Supplement for Cognitive Function & Rest Support, 30 Servings (Package May Vary)
- Momentous Omega 3 Fish Oil 1600mg - Daily Fish Oil Omega 3 Supplement for Women and Men with EPA & DHA - Supports Joint Health - NSF Certified, GMO-Free, Gluten Free, 30 Servings
- Momentous Creatine Monohydrate Powder - Creapure Creatine Powder Supports Strength, Lean Muscle, & Recovery for Men & Women - 5g Per Serving, 90 Servings

---

## 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/451295590-momentous-magtein-magnesium-l-threonate-brain-and-rest-support-supplement](https://www.desertcart.jp/products/451295590-momentous-magtein-magnesium-l-threonate-brain-and-rest-support-supplement)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-18*