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

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

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.

4.6/5

Product ID: 263865106

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Details

Brand
Source
Item form
Capsules
Primary supplement type
Magnesium
Unit count
180 Count
Flavour
Unflavored

💊667mg per capsule potency

🔒Secure packaging ensures freshness

🧠Magnesium L-Threonate for brain support

Frequently Bought Together

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

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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 mind, stay sharp, and never miss a beat!

HIGH POTENCY DOSE - 667mg per capsule delivers effective magnesium levels for optimal absorption
EASY DAILY ROUTINE - Convenient capsule format with a simple 3-capsule serving for busy professionals
LONG LASTING SUPPLY - 180 capsules provide a 2-month regimen for consistent brain health
COGNITIVE CLARITY BOOST - Clinically studied Magtein formula to support memory and focus
PREMIUM QUALITY ASSURANCE - Secure packaging guarantees product integrity and freshness

Source Naturals Magtein Magnesium L-Threonate Capsules deliver 667mg of a brain-optimized magnesium compound per capsule, designed to support cognitive function and memory. With 180 capsules per bottle, this supplement offers a secure, high-quality, and convenient daily regimen tailored for professionals seeking enhanced mental clarity.

Specifications

Weight	0.54 Pounds
Units	180 Count
Serving Recommendation	3 Capsules
Brand	Source Naturals
Format	Capsules

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?

Common Questions

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