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Magnesium L-Threonate (Magtein) Supplement

$30.95

Magnesium L-Threonate enhances brain magnesium levels, promoting cognitive health and helping you stay sharp and focused.
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Description

Double Wood's Magnesium L-Threonate features patented Magtein®, a specialized form of magnesium formulated to cross the blood-brain barrier and deliver magnesium directly to the brain, supporting cognitive function, deep sleep, and nervous system health. It has been studied for its role in supporting brain magnesium levels, a distinction that matters for anyone building a serious cognitive wellness or evening recovery regimen.* Each 4-capsule serving delivers 2,000mg of Magtein®, yielding 144mg of elemental magnesium, matching the dose used in the published research. Every batch is NSF Contents Certified, independently tested and audited to NSF/ANSI 173, with the Certificate of Analysis published openly on this page.

For a more intentional evening regimen, Magnesium L-Threonate pairs most naturally with Apigenin, supporting relaxation and a calm bedtime routine together. L-Theanine rounds out a three-part evening routine for those who want mental calm, nervous system support, and sleep readiness addressed in a single consistent nightly regimen.*

Soy-Free, Gluten-Free, Non-GMO

Benefits
  • Patented by design. Magtein® is the specific, clinically studied form of magnesium L-threonate used in published human research, not a generic magnesium L-threonate alternative.*
  • Built for cognitive support. Magtein® has been studied for its role in supporting memory, working memory, and mental clarity as part of a consistent daily routine.*
  • Supports deep, restorative sleep. Magnesium L-Threonate has been studied for its role in supporting healthy sleep architecture, including deep and REM sleep stages, as part of an evening routine.*
  • NSF Contents Certified, independently tested and audited to NSF/ANSI 173, with the Certificate of Analysis published openly.
  • Your evening pairing. Magnesium L-Threonate pairs naturally with Apigenin as part of an evening routine, and L-Theanine rounds out a more complete three-part wind-down for those who want it.*

Directions & Dosage

Take 4 capsules daily. Most people split the serving, 2 capsules in the morning and 2 capsules approximately 2 hours before bed. Can be taken with or without food. Those new to Magnesium L-Threonate may prefer starting with 2 capsules for the first week before increasing to the full serving.
View Certificate of Analysis View Third Party Test Results
Identity, potency, and contaminants verified per batch Identity, potency, and contaminants verified per batch
Manufactured in an FDA-registered cGMP facility Manufactured in an FDA-registered cGMP facility
Manufactured in the USA from Gloabally Sourced Materials Manufactured in the USA from Gloabally Sourced Materials

Benefits

  • Bioavailable Form of Magnesium: L-Threonate is a mineral chelating agent that may allow the elemental magnesium to cross the blood-brain barrier.
  • Supports Overall Brain Health: Research showed Magnesium L-Threonate is able to deliver magnesium to the brain and support overall cognitive function.
  • Promotes Healthy Sleep: Magnesium L-Threonate may support healthy sleep habits.
Benefits

Magtein (Magnesium L-Threonate)

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.

Magtein (Magnesium L-Threonate)

What Customers Are Saying

Reviews

"I take two capsules an hour before bedtime and it helps me fall asleep quickly and stay asleep. I won’t be without it."

Gayle D.

"Love that it crosses the blood brain barrier and is neuro protective and helps me sleep better."

Jennifer R.

"Love this product! My family takes this for relaxation and to ensure good sleep quality. Highly recommend!"

Anna N.

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Reviews
Supplement Facts

Pairs well with

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.

Frequently Asked Questions

How many mg of elemental magnesium are in Double Wood’s Magnesium L-Threonate?

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.

How much Magtein® Magnesium L-Threonate should you take?

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.

What’s the difference between magnesium L-threonate and Magtein®?

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.

Can you take Magtein® every day long-term?

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.

What should I expect when taking Magtein® Magnesium L-Threonate?

Some people notice changes in relaxation or sleep quality within the first 1–2 weeks of taking Magtein® Magnesium L-Threonate consistently, while cognitive benefits may take longer and were evaluated in studies over 6- and 12-week periods. Some users report vivid dreams or initial drowsiness, especially when taking it at night. If this happens, try taking it earlier in the evening, splitting the serving between morning and night, or starting with 2 capsules before increasing to the full 4-capsule serving. If drowsiness or discomfort continues, stop use and consult your healthcare provider.

Overall rating: 4.8383403 / 5 from 699 reviews.

AI Generated Review Summary

Magnesium L-Threonate (Magtein) Supplement is highly regarded for its quality, effectiveness, and ability to enhance cognitive health. Customers praise its positive impact on sleep quality, blood pressure, and circulation. The product is also noted for its affordability and fast shipping.

Summary topics

  • Supplement Quality (6%): Customers loved this supplement, praising its quality, effectiveness, and affordable price for buying on a bundle.
  • Magnesium Effectiveness (8%): Customers raved about this magnesium, stating it is the best they have ever tried in 40 years.
  • Sleep Quality (14%): It was noted by customers that the product helps them sleep better and provides better quality sleep.
  • Health Benefits (4%): It was highlighted by customers that this product made a positive difference in blood pressure and circulation, making it a great value.
  • Value for Money (9%): It was reported by customers that the price of the product is great and offers good value for money.

Review topics: ["feel","package","husband","issues","quality","results","value","shipping","improvement","dose","benefits","price","stomach","ingredients","energy","sleep","impact","pain","magnesium","supplement","service","difference","work","wood","side effects","order","magnesium l-threonate","capsules","clarity","health"].

Review highlights

  • "Great products, outstanding support, excellent customer service, and competitive pricing!" — Feisal F.
  • "Very High quality product at affordable price." — Anonymous
  • "Best source of magnesium Great company and great price and service" — Anonymous

Reviews

Foot and leg cramp help

"Take two a day and increased my liquid intake. Rarely have foot or leg cramps any more."

— Eliese M. (5/5)

Slight improvement

"I sleep a little better and that’s hugely important. So far, no improvement on my memory… I sure hope that that will improve too!"

— Olga R. (3/5)

Health

"Product is easy to take and begins working shortly after taking."

— Ronald B. (5/5)

Great for sleep

"This is how I sleep at night!"

— Rachael F. (5/5)

Good Product, Great Customer Service

"Double Wood promptly replaced a missing shipment, which means I didn’t miss out on the benefits, improved attention and mood stability."

— Rachel L. (5/5)

Brain 🧠 health

"Great for the brain"

— Joy J. (5/5)

Just getting started

"So far everything has really helped me. Going to continue with all my products."

— Luci S. (4/5)

Don’t take these in the morning!

"I accidentally put these in my morning routine supplements and was tired and sleepy. Tv hers are a night time magnesium and definitely help with relaxation and sleep !!"

— Kay D. (5/5)

Impressive results!

"I'm very impressed with the results I'm noticing from taking this supplement. Comforting knowing Doublewood is third party tested. I will continue using this proven reliable magnesium product. Thanks!"

— David R. (5/5)

Very happy

"This is my favorite magnesium supplement! I am ordering more today"

— Deborah F. (5/5)

Q&A

Magnesium L-Threonate (Magtein) Supplement

From

$30.95

Primary Benefit

Sleep

Other Benefits

Anxiety & Stress, Brain Health

Product Form

Capsule
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