Magtein® Magnesium L-Threonate

Magtein Magnesium L-Threonate is a dietary supplement for brain health and cognitive performance. It contains Magnesium L Threonate, which is clinically studied to support working memory and attention. A study on health Chinese adults showed Magtein® (including phosphatidylserine and vitamins) to support an increase in magnesium levels in the brain. In this double-blind placebo placebo-controlled study, older and healthy participants showed better improvements in memory and cognition with 2g pf Magtein per day. (Source: A Magtein®, Magnesium L-Threonate -Based Formula Improves Brain Cognitive Functions in Healthy Chinese Adults).

While many standard magnesium supplements target muscles or digestion, Metagenics has formulated Magtein® Magnesium L-Threonate particularly to target brain health and cognitive support with continued usage. A recent 2025 6-week clinical trial also found that Magtein®, Magnesium L-Threonate supplementation for 6 weeks can support overall cognition, working memory, cognitive age, and reaction time. It may also improve self-reported sleep improvement. (Source: The effects of magnesium L-threonate (Magtein®) on cognitive performance and sleep quality in adults).

The Metagenics Magtein Magnesium L-Threonate is a fast-acting formulation provides 2g of Magnesium L-Threonate (per serving of 3 capsules). This evidence-based formulation delivers magnesium directly to the brain to support key cognitive functions. 

It’s a fast-acting formulation that starts working in as little as 30 minutes. 

Further, studies support that magnesium offers sleep support and in many Magtein® Magnesium L-Threonate reviews, users have pointed out that it helps them to sleep through the night. They get restful sleep and wakeup energized and refreshed to face their morning routine. 

1. What is Magnesium L-Threonate used for?

Magnesium L-Threonate is clinically studied to support brain and cognitive health. This form of magnesium supports memory, learning capacity, mental clarity, energy, and focus. Metagenics contains this clinically studied Magtein Magnesium L-Threonate in validated dosages per serving. 

2. How much Magnesium L-Threonate can I take daily?

Clinical studies mention that 2g of Magnesium L-Threonate can be beneficial for cognitive health. 3 capsules of Metagenics provides 2g of Magtein Magnesium L-Threonate. You may also start with 2 capsules in divided doses. Consult a healthcare professional to find the right dosage for you. 

3. Can Magnesium L-Threonate help with sleep?

Yes, many clinical studies associate magnesium L-Threonate with improvements in deep and REM sleep. Taking them two hours before bedtime does not affect daytime alertness. 

4. Is Magtein Magnesium L-Threonate better than other magnesium forms?

Other magnesium forms support muscular health and digestion. However, Magnesium L-Threonate form is particularly beneficial for brain health as it increases magnesium levels in the brain. Choose a form of magnesium based on your health goal and consult a healthcare professional. 

Regulatory Compliance Note

These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.