Magnesium L-Threonate Magtein® dietary supplement contains magnesium in the form of magnesium threonate, enclosed in a vegan capsule. Magnesium threonate is a form of magnesium that effectively crosses the blood-brain barrier.
Magnesium is an essential and irreplaceable component of the cell’s biochemical functions, which activates more than 300 different enzymes. It is actively involved in important metabolic pathways such as glycolysis, the Krebs cycle, β-oxidation and ion transport across cell membranes. Given its physicochemical properties, Mg2 can bind to the cell nucleus, ribosomes, cell membranes and macromolecules of the cell cytosol.
Magnesium L-Threonate:
- improves working memory, executive functions, and overall cognitive performance,
- enhances sleep quality – increases the duration of deep sleep and REM phase, supports daily functioning,
- reduces stress and anxiety levels,
- may support the nervous system in anxiety-related responses
- may have a neuroprotective effect by raising magnesium levels in the brain, relevant in preventing neurodegenerative diseases,
- influences neurotransmission (NMDA, GABA, glutamate).
Magnesium:
- helps maintain normal nervous system function,
- contributes to the reduction of feelings of tiredness and fatigue,
- helps maintain electrolyte balance,
- helps maintain normal energy metabolism,
- helps in normal muscle function,
- supports normal protein synthesis,
- helps maintain normal psychological functions,
- helps maintain healthy bones,
- helps maintain healthy teeth,
- plays a role in cell division.
Liu G, Weinger JG, Lu ZL, Xue F, Sadeghpour S. “Efficacy and Safety of MMFS-01, a Synapse Density Enhancer, for Treating Cognitive Impairment in Older Adults: A Randomized, Double-Blind, Placebo-Controlled Trial.” J Alzheimer’s Dis. 2016;49:971-990.
Hausenblas H, Lynch T, Hooper S, Shrestha A, Rosendale D, Gu J. “Magnesium-L-threonate improves sleep quality and daytime functioning in adults with self-reported sleep problems: A randomized controlled trial.” Sleep Medicine: X. August 17, 2024.
Zhang C, Hu Q, Li S, Dai F, Qian W, Hewlings S, Yan T, Wang Y. “A Magtein, Magnesium L-Threonate, -Based Formula Improves Brain Cognitive Functions in Healthy Chinese Adults.” Nutrients. 2022; 14(24):5235.
Hewlings SJ, Kalman DS. “A Randomized, Double-Blind, Placebo-Controlled, Comparator Trial Evaluating Magtein® Magnesium Supplement on Quality of Life as Related to Levels of Stress, Anxiety, Fear and Other Indicators.” EC Nutrition 17.3 (2022): 07-14.
Ingredient |
Amount per daily serving
3 capsules |
Magnesium L-Threonate |
2000 mg |
– |
– Magnesium |
144 mg |
38% DV* |
*DV – Daily Value.
Ingredients: Magnesium L-Threonate, Pullulan – Vegan Capsule Shell.
Gluten-free.
Amount per container: 90 vegan capsules.
Servings per container: 30.
Take 3 capsules daily.
The capsule contents can be emptied and dissolved in water. Magnesium L-Threonate Magtein® supplement dissolves completely in water and is tasteless.
Do not exceed suggested use. Dietary supplements should not replace a varied diet. The product is recommended for adults.
Warning: if pregnant or nursing, consult your doctor before use.
Organoleptic properties: when emptied from the capsule, a white, nearly tasteless powder. It dissolves completely in water. Due to the molecular weight of magnesium threonate and its high level of dusting, a slight residue from the capsules may remain at the bottom of the container.
Batch tests performed towards:
- Microbiology: the presence of listeria, staphylococcus, Escherichia coli and coli groups, salmonella, total microbial count,
- heavy metals (arsenic, cadmium, lead, mercury),
- ethylene oxide and 2-chloroethanol,
- gluten content.
The tests were carried out at the independent, accredited Laboratorium GBA Polska – Certificates of Accreditation no: AB 1095.

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Keep away from the sun at a temperature below 25°C in the original packaging, out of reach of small children.
Production lot number / Best before – see the unit label (left side of the label).