Magnesium L-threonate is designed to cross the blood-brain barrier more effectively, potentially raising brain magnesium levels (Slutsky et al., 2010). Emerging research explores its role in relaxation and sleep.
Standout Evidence
A 2024 double-blind trial in 80 adults with sleep problems showed improvements in subjective sleep quality, deep/REM stages (via wearables), and daytime mood and energy (Hausenblas et al., 2024). This may relate to its enhanced brain bioavailability (Slutsky et al., 2010).
Misconceptions vs. Reality
Some see it as a breakthrough. While early trials are promising, larger replication studies are required (Hausenblas et al., 2024).
Practical Implications
It may support sleep quality and daytime function (Hausenblas et al., 2024). Typical doses are 1–2 grams of the compound nightly.
Keep reading → Part 4: Magnesium Taurate and Other Forms
References
Arab, A., Rafie, N., Amani, R., & Shirani, F. (2023). The role of magnesium in sleep health: a systematic review of available literature. Biological Trace Element Research, 201(1), 121–128. https://doi.org/10.1007/s12011-022-03162-1
Blancquaert, L., Vervaet, C., & Derave, W. (2019). Predicting and testing bioavailability of magnesium supplements. Nutrients, 11(7), 1663. https://doi.org/10.3390/nu11071663
Hausenblas, H. A., Lynch, T., Hooper, S., Shrestha, A., Rosendale, D., & Gu, J. (2024). Magnesium-L-threonate improves sleep quality and daytime functioning in adults with self-reported sleep problems: A randomized controlled trial. Sleep Medicine: X, 8, 100121. https://doi.org/10.1016/j.sleepx.2024.100121
Mah, J., & Pitre, T. (2021). Oral magnesium supplementation for insomnia in older adults: a systematic review & meta-analysis. BMC Complementary Medicine and Therapies, 21(1), 125. https://doi.org/10.1186/s12906-021-03297-z
Schmid, C., et al. (2025). Magnesium bisglycinate supplementation in healthy adults reporting poor sleep: A randomized, placebo-controlled trial. Nature and Science of Sleep, 17, 2027–2040. https://doi.org/10.2147/NSS.S524348
Slutsky, I., et al. (2010). Enhancement of learning and memory by elevating brain magnesium. Neuron, 65(2), 165–177. https://doi.org/10.1016/j.neuron.2009.12.026
Uysal, N., et al. (2019). Timeline (bioavailability) of magnesium compounds in hours: Which magnesium compound works best? Biological Trace Element Research, 187(1), 128–136. https://doi.org/10.1007/s12011-018-1351-9