Metagenics Magnesium L-Threonate – Magtein Magnesium for Brain Health, Memory, Learning & Cognitive Support – Clinically Studied Bioavailable Form – Non-GMO, Gluten-Free, Vegan – 120 Capsules

Customers find this magnesium supplement to be of good quality and effective for sleep, describing it as a natural treatment that helps them sleep better. Moreover, they report positive effects on brain health, with one customer noting improvements in mental clarity and focus. However, several customers find the product super expensive.