Magnesium L-Threonate enhances brain magnesium levels, promoting cognitive health and helping you stay sharp and focused.
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Magnesium is an essential mineral involved in hundreds of processes throughout the body. While there are many forms of magnesium available, Magnesium L-Threonate is unique because it is designed to support brain magnesium levels. This makes it a strong choice for those looking to support cognitive health, focus, and overall brain function.
Each 4-capsule serving provides 2,000 mg of Magtein® Magnesium L-Threonate, yielding 144 mg of elemental magnesium.
Soy-Free, Gluten-Free, Non-GMO
Clinical studies of Magtein® used 1.5–2 g per day. Most adults take 4 capsules (2 g) daily, split between morning and 2 hours before bed.
Magtein® Magnesium L-Threonate has been studied for its ability to support brain magnesium levels, cognitive performance, and sleep quality. For a deeper breakdown of the studies, doses, durations, and outcomes, visit our Magtein® Magnesium L-Threonate research page.
In a 2016 randomized, double-blind, placebo-controlled trial by Liu et al., researchers studied MMFS-01, a magnesium L-threonate formula, in adults aged 50–70 with cognitive impairment and observed improvements in measures of cognitive ability over 12 weeks.
A randomized, double-blind, placebo-controlled trial by Lopresti and Smith studied 2 g per day of Magtein® in 100 adults aged 18–45 with self-reported dissatisfied sleep over 6 weeks, evaluating cognitive performance, cognitive age, sleep quality, and related physiological markers.
The original 2010 Neuron study by Slutsky et al. helped establish the mechanism behind magnesium L-threonate, showing in animal research that increasing brain magnesium was associated with improvements in learning, working memory, short-term memory, long-term memory, and synaptic density.
Every batch is manufactured in a cGMP facility and third-party tested for identity, potency, and contaminants including lead, cadmium, arsenic, and mercury.
Identity, potency, and contaminants verified per batch
Manufactured in an FDA-registered cGMP facility
Manufactured in the USA from Gloabally Sourced Materials
A patented form of magnesium L-threonate. As a dietary nutrient, it is found in foods and may complement an everyday nutrition routine. It is commonly chosen to studied for supporting cognitive function and brain magnesium levels.
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Powerful alone, stronger together. Magnesium L-Threonate (Magtein) Supplement delivers targeted support on its own, but combining it with complementary ingredients can help create a more holistic and balanced approach to wellness.
$22.36
TUDCA is a natural bile acid that supports healthy liver function and overall digestive wellness.
Each 4-capsule serving of Double Wood Magnesium L-Threonate provides 2,000 mg of Magtein® Magnesium L-Threonate, yielding 144 mg of elemental magnesium. This two-part dose matters because “Magtein®” refers to the full magnesium L-threonate compound, while “elemental magnesium” refers to the actual magnesium content delivered per serving.
Clinical studies on Magtein® Magnesium L-Threonate have typically used 1.5–2 g per day, with many adult studies using a 2 g daily dose. Double Wood Magnesium L-Threonate is designed to match that research-backed serving size: each 4-capsule serving provides 2,000 mg of Magtein® Magnesium L-Threonate, yielding 144 mg of elemental magnesium.
For most adults, the suggested serving is 4 capsules daily, often split between morning and evening. Some people prefer starting with 2 capsules for the first week to assess tolerance, then increasing to the full 4-capsule serving. Always follow the label directions and consult your healthcare provider if you are pregnant, nursing, taking medication, or managing a medical condition.
Magnesium L-threonate is a form of magnesium bound to L-threonic acid. Magtein® is the patented, clinically studied form of magnesium L-threonate used in research on brain magnesium levels, cognitive performance, and sleep quality. Double Wood Magnesium L-Threonate is made with Magtein®, not a generic magnesium L-threonate ingredient.
Magtein® Magnesium L-Threonate is commonly taken daily as part of a long-term cognitive health or sleep-support routine. Clinical studies have evaluated daily use over multiple weeks, including 6- and 12-week study periods. Always follow the label directions, and consult your healthcare provider if you are pregnant, nursing, taking medication, or managing a medical condition.
Yes. Every batch is independently assayed by an ISO/IEC 17025:2017-accredited laboratory (PJLA Accreditation No. 86258) in St. Petersburg, FL, with a Certificate of Analysis signed by Philias Daka, PhD, QA Manager. The most recent third-party report covers Lot 2430402, dated 02/21/2025, which verified 2,000 mg of Magnesium L-Threonate (Magtein) and 144 mg of elemental magnesium per 4-capsule serving by USP 38 Titration — both PASS. Every batch is also screened for identity, heavy metals (arsenic, cadmium, lead, mercury via ICP-MS), and microbial contamination (Total Plate Count, Yeast & Mold, Coliform, E. coli, Salmonella, Staphylococcus aureus). Manufactured in a cGMP-certified U.S. facility from globally sourced ingredients.
The COA confirms identity and potency of Magtein® patented magnesium L-threonate, with the active assay verified by titration against USP standards. The most recently published third-party assay (Lot 2430402, reported 02/21/2025) returned a PASS on both the 2,000 mg L-threonate spec and the 144 mg elemental magnesium spec per 4-capsule serving. The full COA panel also confirms heavy metals are below USP <2232> limits and microbial counts are within USP <2021>/<2022> specifications. The current batch COA and third-party test report are both linked above for verification against the lot number printed on your bottle.
Magnesium L-Threonate (Magtein) Supplement is highly regarded for its ability to enhance brain magnesium levels, supporting cognitive health. Customers appreciate its quality, effectiveness, and the noticeable difference it makes in blood pressure and circulation. The product is praised for its sleep-enhancing properties, excellent customer service, and fast, reliable shipping. It is also noted for its great price and soy-free, gluten-free, non-GMO formulation.
Awesome
I've been using this for three months now and the difference is remarkable. The price point is very reasonable compared to similar products. Customer service was also very helpful when I had questions.
This is my favorite magnesium supplement! I am ordering more today
