Magnesium L-threonate (commonly sold under the brand name Magtein) is a form of magnesium specifically developed for its ability to cross the blood-brain barrier and increase magnesium levels in the brain. It is primarily used for cognitive support and sleep quality. The standard dose is 2000mg of the full magnesium L-threonate compound per day, which delivers approximately 144mg of elemental magnesium — this distinction matters because the 2000mg refers to compound weight, not elemental magnesium content. Serving sizes range from 2 to 4 capsules per dose depending on the brand. It is typically taken in the evening, 30–60 minutes before bed. Products below are ranked by cost at your chosen daily dose.
Read our Magnesium Threonate price comparison guide for tips on what to look for when buying magnesium threonate.
| # | Product | 30-day cost | Supply | Sticker | |
|---|---|---|---|---|---|
| 1 |
Magnesium L-Threonate Capsules, High Absorption Magnesium Supplement 2000mg, Chelated Magnesium for Brain, Cognitive, Sleep & Muscle Support, Gentle on Stomach, 120 Vegan Capsules
NATURE TARGET Store
|
$11.30 | 48d | $22.59 | View on Amazon |
| 2 |
KiddoCalm Magnesium Gummies - Magtein Magnesium L-Threonate Gummy for Kids, Focus, Calm, Sleep, Attention & Brain Health Support Supplement for Children - 90 Vegan Gummies
Magceutics Store
|
$11.33 | 1d | $16.99 | View on Amazon |
| 3 |
180 Count | Magnesium Gummies for Women & Men, Support Calm, Restful Sleep & Muscle Health, Sugar Free, Vegan, Non-GMO, Raspberry Flavor
Zetelixia
|
$12.32 | 90d | $36.95 | View on Amazon |
| 4 |
Magnesium L-Threonate Supplement 120 Capsules, 2000 mg Magnesium Threonate with Vitamin C & D3, High Absorption, Non-GMO (60 Days Supply)
YZQ WAIDE
|
$12.50 | 60d | $24.99 | View on Amazon |
| 5 |
3000mg Liposomal Magnesium Threonate Gummies, Magnesium Glycinate Supplements, Liposomal Enhance 98% Absorption, Intestinal Tolerance, Muscle & Nervous System Support for Adults
CocoaNee
|
$13.00 | 90d | $25.99 | View on Amazon |
| 6 |
2 Pack Magnesium L-Threonate Gummies - 2000mg for Brain, Muscle & Nervous System Support. Sugar-Free Raspberry Flavor, 120 Count for Kids & Adults
VAJYKEWJY
|
$13.49 | 60d | $26.99 | View on Amazon |
| 7 |
Kappa Nutrition Powered by Magbrain™ Magnesium L-Threonate Plant-Based, 420mg Elemental Magnesium (3 Capsules) from 2,253mg, 120 Vegan Capsules, Brain, Sleep & Muscle Support.
KAPPA NUTRITION Store
|
$14.00 | 60d | $27.99 | View on Amazon |
| 8 |
Magnesium L-Threonate, Citrate, Malate & Glycinate, 150 Chelated Pills, High Absorption Magnesium Supplement for Women and Men, Extra Strength Complex Capsules, Non-GMO & Gluten Free
ForestVibe Store
|
$14.99 | 25d | $24.99 | View on Amazon |
| 9 |
Magnesium L-Threonate 2000mg | 10-in-1 Supplement for Brain Health & Cognitive Support | High-Absorption Magnesium Threonate Capsules, 60 Count
RimTuku
|
$16.99 | 30d | $16.99 | View on Amazon |
| 10 |
Jarrow Formulas Magnesium L-Threonate, MagMind Magtein Magnesium Supplement, Brain Supplements for Memory Support, 90 Veggie Capsules, Up to a 30 Day Supply
Jarrow Formulas Store
|
$17.00 | 60d | $33.99 | View on Amazon |
| 11 |
KAL Think Magnesium L-Threonate 2000 mg | Learning, Brain Health & Memory Function Support w/Magtein | Vegan, No Gluten & Non-GMO | 60 Tablets
KAL Store
|
$17.50 | 30d | $34.99 | View on Amazon |
| 12 |
Kappa Nutrition Powered by Magbrain™ Magnesium L-Threonate Plant-Based, 150 Vegan Capsules, 420mg Elemental Magnesium (3 Capsules) from 2,253mg, Brain, Sleep & Muscle Support.
KAPPA NUTRITION Store
|
$19.19 | 50d | $31.99 | View on Amazon |
| 13 |
Magnesium L-Threonate Liquid Drops 1500mg High Absorption Brain Supplement for Memory Focus Sleep Sugar Free Vegan 2.04 Fl Oz, GMP Certified for Kids and Adults
SustainWell
|
$19.96 | 23d | $19.96 | View on Amazon |
| 14 |
1000mg Magnesium L-Threonate Gummies for Kids & Adults - Muscle & Nervous System Support, Vegan, Sugar-Free Strawberry Flavor, 60 Gummies
BVIVLOO Store
|
$19.99 | 15d | $19.99 | View on Amazon |
| 15 |
Magnesium L-Threonate Drops: Focus & Memory Booster for Students, High Absorption Liquid Formula
Hodiary
|
$19.99 | 2d | $19.99 | View on Amazon |
| 16 |
Magnesium L-Threonate Liquid Drops Restore Health Magnesium Levels Support Cardiovascular Promote Restful Sleep Relax Pineapple Flavor 60ml
Itiban Store
|
$19.99 | 23d | $19.99 | View on Amazon |
| 17 |
Magtein Magnesium L-Threonate – 2000mg Mag Complex with L Threonate, Glycinate, Citrate & Vitamin B6 – Brain Health, Memory, Focus & Mental Clarity | 300mg Elemental Magnesium | 90 Capsules
New Elements Store
|
$19.99 | 15d | $19.99 | View on Amazon |
| 18 |
1000mg Magnesium L-Threonate Gummies for Adults - Muscle & Nervous System Support, Vegan, Sugar-Free Raspberry Flavor, 120 Gummies
BVIVLOO Store
|
$19.99 | 15d | $19.99 | View on Amazon |
| 19 |
Magnesium L-Threonate Supplement 2000mg,Liposomal Magnesium Threonate High Absorption for Energy &Immune,Vegan, Non-GMO,60 Capsules(Pack of 1)
HICFRWE Store
|
$19.99 | 30d | $19.99 | View on Amazon |
| 20 |
Suzy Cohen MagFocus Magnesium L-Threonate Powder with Magtein (Mixed Berry) Plus Magnesium Glycinate for Wellness, Focus, and Cognition - Gluten-Free, Non-GMO, Vegetarian (60 Servings)
Script Essentials Store
|
$22.49 | 30d | $44.99 | View on Amazon |
| 21 |
Jarrow Formulas Magnesium L-Threonate, MagMind Productivity, High Absorption Magnesium, Brain Supplements for Memory and Focus, 60 Veggie Capsules, Up to a 30 Day Supply
Jarrow Formulas Store
|
$23.99 | 15d | $23.99 | View on Amazon |
| 22 |
Magnesium L-Threonate 1200mg Gummies to Support Focus & Muscles, Sugar-Free Raspberry Flavor, 120 Count for Adults & Kids
Haohan
|
$23.99 | 18d | $23.99 | View on Amazon |
| 23 |
Horbäach Magtein Magnesium L-Threonate | 2000mg Supplement | 100 Capsules | for Men & Women | Non-GMO and Gluten Free
Horbäach Store
|
$27.23 | 33d | $29.95 | View on Amazon |
| 24 |
Sports Research® Magnesium L-Threonate Capsules 2000mg - High-Absorption Magtein® for Enhanced Brain Health, Memory, Focus & Restful Sleep Support - Vegan · Non-GMO · Gluten Free - 180 Count
|
$29.48 | 60d | $58.95 | View on Amazon |
| 25 |
Qunol Q-Mag Magnesium L-Threonate Tablets, 2000mg of Magtein to Help Support Cognitive Performance, Improve Mental Alertness & Productivity, Supports Restful Sleep, High Absorption, 60 Count
Qunol Store
|
$29.73 | 30d | $29.73 | View on Amazon |
| 26 |
Magnesium L Threonate, Magtein, Brain Supplement for Memory, Focus, Sleep and Cognitive Support, High Absorption Magnesium L-Threonate, Non-GMO, No Laxative Effect – 2,000 mg, 120 Vegan Capsules
Teraputics Store
|
$29.95 | 30d | $29.95 | View on Amazon |
| 27 |
Sports Research® Magnesium L-Threonate Capsules 2000mg - High-Absorption Magtein® for Enhanced Brain Health, Memory, Focus & Restful Sleep Support - Vegan · Non-GMO · Gluten Free - 90 Count
Sports Research Store
|
$29.95 | 30d | $29.95 | View on Amazon |
| 28 |
Bluebonnet Nutrition Magtein Magnesium L-Threonate, Brain Health*, Non-GMO, Vegan, Kosher Certified, Gluten-Free, Soy-Free, 90 Vegetable Capsules, 30 Servings
BlueBonnet Store
|
$29.96 | 2d | $29.96 | View on Amazon |
| 29 |
NOW Foods Supplements Magtein, Magnesium L-Threonate, Cognitive Support*, 120 Veg Capsules
NOW Foods Store
|
$29.96 | 40d | $39.95 | View on Amazon |
| 30 |
Magnesium L-Threonate Complex 7-in-1 with 1000mg of Magtein Plus Magnesium as Bisglycinate, Taurate, Citrate, Gluconate, Malate & Lactate - Supports Sleep - Vegan, US Made and No Artificial Nasties
swiss bioenergetics Store
|
$29.97 | 15d | $29.97 | View on Amazon |
| 31 |
Magnesium L-Threonate Capsules, Original Patented Magtein™ Form of Magnesium (Mg), Improve Memory, Cognition and Sleep Quality (90 Capsules)
LIFE CAPX Store
|
$29.99 | 2d | $29.99 | View on Amazon |
| 32 |
BESTVITE Magtein Magnesium L-Threonate Capsules - 2000mg per Serving (120 Vegetarian Capsules) - Patented and Bioavailable Magnesium - No Stearates - No Fillers - Vegan - Non GMO - Gluten Free
BESTVITE Store
|
$29.99 | 40d | $39.99 | View on Amazon |
| 33 |
Source Naturals Magtein Magnesium L-Threonate, 667mg, Supports Focus, Mood, Healthy Memory, Cognitive Function - 180 Capsules
Source Naturals Store
|
$30.10 | 60d | $60.19 | View on Amazon |
| 34 |
Life Extension Neuro-Mag Magnesium L-Threonate, 150 Vegetarian Capsules, Magtein Supplement for Women and Men
Life Extension Store
|
$30.57 | 50d | $50.95 | View on Amazon |
| 35 |
Product gallery
Source Naturals Store
|
$30.79 | 30d | $30.79 | View on Amazon |
| 36 |
Life Extension Neuro-Mag Magnesium L-Threonate, Memory Health, Quick Thinking, Cognitive Health Support, Vegetarian, Non-GMO, 90 Vegetarian Capsules (144 mg from 2000 mg Magtein magnesium L-threonate
|
$30.79 | 30d | $30.79 | View on Amazon |
| 37 |
Life Extension Neuro-Mag Magnesium L-Threonate Powder (Tropical Punch) - Ultra-Absorbable Magnesium - Supports Memory, Focus, Cognitive Function & Mood - Gluten free, Non-GMO, Vegetarian (30 Servings)
Life Extension Store
|
$31.50 | 30d | $31.50 | View on Amazon |
| 38 |
1000mg Magnesium L-Threonate Gummies for Kids & Adults - Muscle & Nervous System Support, Vegan, Sugar-Free Strawberry Flavor, 120 Gummies
BVIVLOO Store
|
$31.99 | 15d | $31.99 | View on Amazon |
| 39 |
Nootropics Depot Magtein Magnesium L-Threonate Powder | 120 Grams | Mineral Supplement, Natural | Supports Mitochondrial Function, Cognitive Function | Promotes Heart & Cardiosvascular Health
Nootropics Depot Store
|
$32.99 | 60d | $65.99 | View on Amazon |
| 40 |
Nutricost Magnesium L-Threonate As Magtein 2000mg, 120 Capsules - Non-GMO, Gluten Free, Vegetarian Friendly
Nutricost Store
|
$33.71 | 40d | $44.95 | View on Amazon |
| 41 |
Dr. Mercola Magnesium L-Threonate, Magnesium Advanced Supplement with Magtein, 2000 mg per Serving, High Bioavailability for Cognitive Support, Memory & Brain Health, Non-GMO, Gluten Free, 90 Capsule
Dr. Mercola Store
|
$34.97 | 30d | $34.97 | View on Amazon |
| 42 |
Dr. Mercola Magnesium Advanced - 2,000 mg Magtein Magnesium L-Threonate - Supports Brain & Cellular Function - Superior Absorption - Non-GMO, Gluten-Free & Soy-Free - 90 Capsules (2 Pack, 60 Servings)
Dr. Mercola Store
|
$34.97 | 60d | $69.94 | View on Amazon |
| 43 |
Forest Leaf Magnesium L-Threonate Magtein Capsules - 2000mg Magnesium Threonate Supplement Supports Cognitive Function, Focus, Brain, Deep Calm and Sleep for Men & Women | 90 Powder Veg Caps
ForestLeaf Store
|
$34.99 | 30d | $34.99 | View on Amazon |
| 44 |
iMagT - Magnesium L-Threonate. Powder 100g by Sabre Sciences
Sabre Sciences
|
$35.50 | 30d | $71.00 | View on Amazon |
| 45 |
Metagenics Magnesium L-Threonate - Magtein Magnesium for Brain Health, Memory, Learning & Cognitive Support - Clinically Studied Bioavailable Form - Non-GMO, Gluten-Free, Vegan - 120 Capsules
Metagenics Store
|
$36.25 | 39d | $72.50 | View on Amazon |
| 46 |
MagTech Magnesium Drink Mix - Sugar Free Lemonade - 3 Forms of Magnesium: Magtein L-Threonate, Glycinate & Taurate - 200mg Chelated Magnesium Complex - Supports Relaxation & Brain Health - 20 Servings
NATURAL STACKS Store
|
$38.21 | 15d | $38.21 | View on Amazon |
| 47 |
NAOMI Magtein® Magnesium L-Threonate 2000mg - Supports Healthy Cognitive Function, Working Memory & Focus - Patented MIT-Developed Formula, Brain Magnesium Support, Non-GMO, Vegan, 30-Day Supply
NAOMI Store
|
$39.99 | 30d | $39.99 | View on Amazon |
| 48 |
MegaFood Magtein Magnesium L-Threonate - Magnesium Supplement 2000mg Per Serving - Supports Short-Term Memory, Focus, Alertness & Normal Sleep Cycles - Vegan, Gluten Free - 90 Capsules, 30 Servings
MegaFood Store
|
$39.99 | 30d | $39.99 | View on Amazon |
| 49 |
Codeage Liposomal Magnesium L-Threonate Supplement, Patented Magtein Magnesium Threonate for Brain Health, Memory and Cognitive Function Support, Bioavailable, Non-GMO - 90 Capsules
Codeage Store
|
$44.99 | 30d | $44.99 | View on Amazon |
| 50 |
Ekkovision Magtein Magnesium L-Threonate, Memory & Cognitive Function Support, Magnesium Supplement with Essential Minerals for Men & Women, 2000 MG Per Serving, 120 Easy-to-Swallow Capsules
Ekkovision Store
|
$44.99 | 2d | $44.99 | View on Amazon |
| 51 |
XYMOGEN OptiMag Neuro - Magnesium L-Threonate with Albion Chelates - Brain, Stress & Sleep Support - Bioavailable Magnesium Complex - Vegan, Gluten-Free, & Non-GMO - 90 Capsules
XYMOGEN Store
|
$64.99 | 15d | $64.99 | View on Amazon |
| 52 |
Designs for Health NeuroMag Bioavailable Magnesium L-Threonate - Chelated Magnesium Supplement from Magtein for Brain Health & Cognitive Function, Support Focus & Sleep* (90 Vegan Capsules)
Designs for Health Store
|
$72.49 | 30d | $72.49 | View on Amazon |
Magnesium threonate labels often show two different numbers: the magnesium L-threonate compound amount and the elemental magnesium amount. Labels reviewed for this update listed examples such as 2,000 mg magnesium L-threonate from Magtein with about 144-145 mg elemental magnesium.
Cost changes with the labeled magnesium L-threonate amount, serving count, form, and branded-ingredient positioning. Many capsule products require 3-4 capsules for a 2 g serving, while gummies, liquids, powders, and low-dose products can shift the monthly cost sharply.
Do not compare elemental magnesium milligrams as if they were magnesium L-threonate compound milligrams. Also avoid treating glycinate, malate, citrate, or generic magnesium blends as equivalent to magnesium L-threonate unless the label separately lists the threonate amount.
Magnesium threonate has a moderate evidence rating here. TrueServing compares the labeled magnesium L-threonate amount and price; it does not judge Magtein licensing, cognitive claims, sleep claims, or whether another magnesium form would fit a shopper better.
TrueServing participates in the Amazon Associates program. We may earn a commission when you purchase through our links at no extra cost to you. Prices are updated regularly but may vary.