Magtein: 26.3 oz (667 mg) 180 Caps

Q: 3 capsules contain 2 gm magnesium l-threonate and 144 mg of magnesium. How much L-threonate is this? Product label says nothing.

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.

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

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?

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.

Product ID: 739660770

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Details

Brand
Naturals)
Item Form
Capsule
Primary Supplement Type
Magnesium
Unit Count
180 粒
Number of Items
1
Item Weight
0.1 Pounds

🌿Free from common allergens & synthetic additives

💊180 easy-to-swallow gelatin capsules

🧠667 mg Magnesium L-Threonate per cap

Frequently Bought Together

Source Naturals Magtein Magnesium L-Threonate, 667mg, Supports Focus, Mood, Healthy Memory, Cognitive Function - 180 Capsules

SlowMag Muscle + Heart Magnesium Chloride with Calcium Supplement to Support Muscle Relaxation, Occasional Muscle Cramping & Heart Health, High Absorption, 180 Count

Jarrow Formulas Extra Strength Methyl B-12 1000 mcg & Methyl Folate 400 mcg + P-5-P, Dietary Supplement for Cellular Energy Metabolism and Cardiovascular Support, 100 Chewable Tablets, 100 Day Supply

Description

🧠 Elevate your mental edge—because your brain deserves the best!

CLEAN PURE FORMULA - No yeast, dairy, gluten, soy, or synthetic fillers—just pure wellness
HIGH CAPACITY SUPPLY - 180 capsules to keep your mind sharp for months without interruption
TAILORED FOR ADULTS 35 - Formulated to support brain health in the prime of your professional life
BRAIN BOOSTING MAGNESIUM - 667 mg of bioavailable Magtein per capsule for enhanced cognitive support
GLOBALLY COMPLIANT PACKAGING - Optimized for smooth customs clearance with personal import compliance

Magtein offers a premium magnesium L-threonate supplement delivering 667 mg per capsule in a clean, allergen-free formula. Packaged as 180 gelatin capsules, it supports cognitive function and brain health, especially for adults aged 35 and above, with a focus on bioavailability and purity.

Specifications

Product Dimensions	3.3 x 3.3 x 4.06 cm; 45.36 g
Target Age Range Description	35年
Target Gender	Unisex
Color	Multicolor

Have a Question? See What Others Asked

3 capsules contain 2 gm magnesium l-threonate and 144 mg of magnesium. How much L-threonate is this? Product label says nothing.

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.

why 2000 mg in some and 645 mg in others

Is it best to take with food or on empty stomach?

Reviews

香**子

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。

26.05.2025

お**る

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。

15.12.2022

H**S

Magtein

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.

2.12.2022

シ**ン

DANGEROUS. ANXIETY & Heart Problems!!

I have been hospitalized 3 times in the past few weeks due to hyperventilation and extremely high anxiety. I thought it was caffeine and not enough exercise, so I stopped caffeine but was still having breathing issues and anxiety. I narrowed the extreme anxiety down to this supplement. I cut it out completely and anxiety is gone. MAGTEIN gives you anxiety and is terrible for good sleep. Research more into this and you will see it’s terrible. BUYER BEWARE.

23.10.2023

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