Magtein Magnesium L-Threonate Sleep

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Magtein Magnesium L-Threonate Sleep

A research-popularized form. Brain-permeable magnesium.

Magtein Magnesium L-Threonate Sleep

★★★★☆4.7 / 5 rating
3 capsPer dose
2000 mgL-threonate
30Servings
MagteinForm
Amazon US$45→ Visit store

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a research-popularized form. Brain-permeable magnesium.

What is Magtein Magnesium L-Threonate Sleep?

Magtein Magnesium L-Threonate Sleep is part of our editor-vetted catalog of premium supplements. Our research team reviews each formula’s third-party testing, clinical research, and value to bring you transparent, evidence-based recommendations.

At a Glance

  • Per dose: 3 caps
  • L-threonate: 2000 mg
  • Servings: 30
  • Form: Magtein

How We Researched This Product

Our editorial team evaluates every product against criteria including: ingredient quality and bioavailability, third-party testing (USP, NSF, ConsumerLab), dosage compared to clinical research, brand reputation and manufacturing standards, value per serving, and customer feedback patterns.

Where to Buy

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⚡ Quick Answer

Magtein Magnesium L-Threonate Sleep

Click any of the price-comparison buttons above to check current pricing at our verified retail partners. As an Amazon Associate we earn from qualifying purchases.

Important Notes

Educational content — not medical advice. Consult a qualified healthcare provider before adding any supplement to your routine, especially if you take prescription medication or have a medical condition.

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Scientific References
  • 1Abbasi B, et al. (2012). The effect of magnesium supplementation on primary insomnia in elderly: A double-blind placebo-controlled clinical trial. J Res Med Sci. PMID 23853635
  • 2Tarleton EK, et al. (2017). Role of dietary magnesium in the treatment of depression. PLoS ONE. PMID 28654669
  • 3Zhang Y, et al. (2016). Can Magnesium Enhance Exercise Performance?. Nutrients. PMID 27005558
  • 4Veronese N, et al. (2016). Magnesium and health outcomes: an umbrella review. Eur J Nutr. PMID 27450455
  • 5Wienecke E, Nolden C. (2016). Long-term HRV analysis shows stress reduction by magnesium intake. MMW Fortschr Med. PMID 28378064

All studies are peer-reviewed and sourced from PubMed/NCBI. This article is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare provider before starting any supplement regimen.

❓Frequently Asked Questions
Magnesium glycinate is the gold standard for sleep. It pairs magnesium with glycine, an inhibitory neurotransmitter that independently promotes sleep. Magnesium threonate is an excellent second choice for cognitive benefits. Avoid magnesium oxide — it has poor absorption (~4%) and mainly acts as a laxative.
Yes — magnesium is safe for daily use and most adults benefit from consistent supplementation. The body excretes excess magnesium through the kidneys (in healthy individuals). The Tolerable Upper Intake Level is 350mg of supplemental magnesium per day for adults. Higher doses from food are fine.
Most people notice calming effects within 3–7 days of daily supplementation. The anti-anxiety effects (via GABA modulation and HPA axis regulation) reach full potency at 3–4 weeks. Deficient individuals often feel significant anxiety reduction within the first week.
Yes — magnesium deficiency is a primary cause of muscle cramps, especially nocturnal leg cramps. Supplementing 300–400mg daily typically reduces cramp frequency within 1–2 weeks. Athletes who lose significant magnesium through sweat see the most dramatic improvement.
Magnesium is most beneficial taken at night, 30–60 minutes before bed. It promotes GABA activity and melatonin production, both of which are relevant to sleep. However, glycinate and malate forms can also be taken in the morning without causing drowsiness, as the calming effect is subtle at recommended doses.
The richest food sources are pumpkin seeds (168mg/oz), dark chocolate (64mg/oz), spinach (157mg/cup cooked), black beans (120mg/cup), and edamame (99mg/cup). However, to reach 400mg from food alone requires eating multiple servings of these specific foods daily — impractical for most people.