Magtein Magnesium L-Threonate 667 mg®

Minerals

Brand: Source Naturals

CapsuleMineralOff Market

Product label for Magtein Magnesium L-Threonate 667 mg — Click to view full label

Net Contents

180 Capsule(s)

Serving Size

1–3 Capsule(s)

Servings Per Container

Supplement Form

Capsule

Bar Code (UPC/SKU)

0 21078 02486 6

Product Version

SN2486 REV C151-A

Label Analysis

Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.

3Active Ingredients

3 distinct active ingredients are disclosed in Supplement Facts.

100%Amount Transparency

Every active ingredient discloses a specific amount per serving.

1% Daily Value Coverage

1 ingredients report an established %DV per serving.

1Dietary Attributes

Label states: Gluten-Free.

This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.

Allergen Guide

Contains

Milk
Egg
Wheat
Soy
Gluten

Allergen flags are parsed automatically from the official label's claims and statements. Always verify against the physical product label before use, especially if you have a severe allergy.

Supplement Facts

Serving Size: 1–3 Capsule(s) · 1 per day

Ingredient	Amount Per Serving	% Daily Value
Calories	10 Calorie(s)	—
Magnesium(Magnesium L-Threonate)	144 mg	36%
Magtein(Magnesium L-Threonate)	2 Gram(s)	—

Not Present

Other Ingredients

GelatinMaltodextrinSilicaMagnesium Stearate

Target Groups

Adult (18 - 50 Years)Gluten FreeDairy FreeSugar Free

Label Claims

NutrientAll OtherStructure/Function

Directions & Suggested Use

Suggested/Recommended/Usage/Directions

Suggested Use: 3 capsules daily, preferably 2 capsules during the day and 1 capsule 1-2 hours before bed. Start with 1 capsule daily and gradually increase to 3 capsules daily.

Warnings & Precautions

Precautions re: Pregnant or Nursing or Prescription Medications

Note: If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product.

Precautions re: All Other

Do not use if either tamper-evident seal is broken or missing.

Precautions re: Children

Keep out of the reach of children.

Storage

Store in a cool, dry place.

Formulation

Formulation re: Other

For learning and memory

Formula re: Contains

Magnesium (Mg) plays an essential role in supporting cognitive function and brain health. Preliminary research suggests that Magtein (magnesium L-threonate) may provide more magnesium to the brain than other forms of magnesium. It is theorized that this is the reason why Magtein was shown in preclinical studies to support healthy memory and learning as well as healthy brain synapse density in regions of the brain associated with memory.

Formulation re: Does NOT Contain

Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.

FDA Statements

FDA Statement of Identity

Dietary Supplement

FDA Disclaimer Statement

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

Other Label Statements

Brand IP Statement(s) re: (c), (TM), (SM)

Magtein Think Clearly is covered by registered and pending U.S. Patents; is a trademark of Magceutics, Inc. and is distributed exclusively by AIDP, Inc.

Brand IP Statement(s) re: (c), (TM), (SM)

Manufacturer & Distributor

Distributor

Source Naturals, Inc.

P. O. Box 2118, Santa Cruz, CA, 95062

Market Reference

$8.55 – $72.50· 40 listings

Magtein Source Naturals
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$45.99
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Betsy's Health Foods
$29.96
Nutricost Magtein Magnesium L-Threonate
iHerb4.7(480)
$35.00
Nutrivein Magnesium L-Threonate
Nutrivein4.3(129)
$29.95
NOW Foods Magtein Powder
DPS Nutrition4.8(60)
$31.99

Where to Buy Locally

Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.

Showing representative supplement & health retailers — search above for stores in your area.

GNC
3.9 (66)
Vitamin & supplements store
5162 Memorial Dr Ste 605, Stone Mountain, GA 30083
Directions (404) 297-0041
Optimal Nutrition & Wellness
4.6 (10)
Vitamin & supplements store
2296 Henderson Mill Rd #405, Atlanta, GA 30345
Directions (404) 941-8625
The Vitamin Shoppe
4.3 (158)
Vitamin & supplements store
3261 Peachtree Rd, Atlanta, GA 30305
Directions (404) 262-0400
Good Nutrition
4.5 (118)
Health food store
2855 N Druid Hills Rd NE, Atlanta, GA 30329
Directions (404) 929-8900
The Supplement Shop LLC
5.0 (5)
Vitamin & supplements store
6700 Dawson Blvd, Norcross, GA 30093
Directions (678) 725-0507
The Vitamin Shoppe
3.9 (213)
Vitamin & supplements store
1209 Caroline St NE, Atlanta, GA 30307
Directions (404) 659-3127
GNC
4.3 (42)
Vitamin & supplements store
2484 Briarcliff Rd NE #37, Atlanta, GA 30329
Directions (404) 325-8580
The Vitamin Shoppe
4.3 (146)
Vitamin & supplements store
1165 Perimeter Center W #360, Atlanta, GA 30338
Directions (770) 396-7152

Research & Studies

The effects of magnesium L-threonate (Magtein®) on cognitive performance and sleep quality in adults: a randomised, double-blind, placebo-controlled trial
AL Lopresti, SJ Smith - Frontiers in Nutrition, 2025 - frontiersin.org
… of magnesium supplementation (in the form of Magtein ® ) on cognition in healthy young-to-… study demonstrate that magnesium L-threonate (Magtein ® ) supplementation for 6 weeks …
202513 citations
A Magtein®, magnesium L-threonate,-based formula improves brain cognitive functions in healthy chinese adults
C Zhang, Q Hu, S Li, F Dai, W Qian, S Hewlings, T Yan… - Nutrients, 2022 - mdpi.com
… after one month of magnesium L-threonate (Magtein ® ) supplementation, the concentration of … changes in cognitive function with the supplementation of Magtein ® PS in healthy adults. …
202283 citations
Enhanced neurophysiological benefits of magnesium-acetyl-taurate over magnesium-l-threonate: a comparative pre-clinical study on bioavailability, synaptic plasticity …
A Kumar, S Mehan, S Gupta, GD Gupta… - NeuroMolecular …, 2026 - Springer
… Future research should focus on refining methods for higher-brain bioavailable magnesium salt supplementation and investigating the combined effects of such magnesium salts with …
20262 citations
Magtein®
B Energy - wholefoodsmagazine.com
… magnesium supplement called Magtein® (magnesium … only important for our overall health but also for our immune health. … Magtein® is a patented form of magnesium L-threonate that …
Kalman.“A Randomized, Double-Blind, Placebo-Controlled, Comparator Trial Evaluating Mag-tein® Magnesium Supplement on Quality of Life as Related to …
SJ Hewlings, S Douglas - EC Nutrition, 2022 - researchgate.net
… Magnesium L threonate (Magtein®) were 108-144 mg/day which is below the RDA of 350 - 420 mg… Furthermore, the subjects were healthy with self-reported anxiety therefore there is no …
202210 citations
Health Science
JCM Carvalho, FAA Rodrigues - academia.edu
… a bibliographical review about the supplementation of creatine, … Furthermore, we examine the role of magnesium L-Threonate, iron … Magtein®PS, a formulation based on magnesium …

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Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2023-08-23. DSLD Label ID: 295978. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.