# Magnesium L-Threonate 2000mg | Brain & Sleep Support Source: https://eternalelixir.com.au/product/magnesium-l-threonate-capsules/ Last updated: 2026-09-15 **Price:** $59.99 **Availability:** In Stock **SKU:** EE-MAG-THREONATE-CAPS --- ## Magnesium L-Threonate 2000mg: the magnesium that reaches the brain Most magnesium supplements never get past the bloodstream. Magnesium L-threonate is different: magnesium is bound to L-threonate, a metabolite of vitamin C that is actively transported across the blood-brain barrier. It is the form researchers turn to when the goal is memory, focus, mood and sleep rather than muscle cramps or digestion. Each three-capsule serve delivers 2,000 mg of magnesium L-threonate (magnesium threonate), the amount used in the landmark 12-week clinical trial, in 90 vegetable capsules for a full 30-day supply. ## Why the form matters Magnesium is a cofactor in more than 300 enzyme systems and a natural regulator of the NMDA receptor, the switch behind learning and memory. Ordinary forms such as oxide, citrate and glycinate raise blood magnesium but do little for brain magnesium. In preclinical research, magnesium L-threonate lifted magnesium in cerebrospinal fluid and brain tissue, increased synaptic density and improved learning and memory, results that other forms did not match. In a randomised, double-blind, placebo-controlled trial in adults aged 50 to 70, 12 weeks of magnesium L-threonate improved a composite measure of overall cognitive ability versus placebo. A separate randomised trial in 2024 found that three weeks of magnesium L-threonate improved sleep quality and daytime functioning in adults with self-reported sleep problems. ## What to expect Sleep is usually the first thing people notice, often within the first one to three weeks: falling asleep more easily and waking less groggy. Cognitive benefits build more gradually and were measured at six and twelve weeks in the clinical trial, so give it a full bottle before judging and ideally three months of consistent use. Because the L-threonate carrier is gentle on the gut, it is far less likely to cause the digestive upset associated with magnesium oxide or citrate. ## Ingredients Magnesium L-Threonate 2,000 mg per three-capsule serve. Magnesium L-threonate is about 7% elemental magnesium by weight, so each serve provides approximately 144 mg of elemental magnesium; the label lists the compound weight, which is the figure used in the research. Other ingredients: vegetable capsule, rice flour. No artificial fillers, colours or preservatives. Suitable for vegans and vegetarians. ## Suggested use Take three (3) capsules daily with a meal, or as directed by your healthcare professional. For sleep support, take the full serve in the evening one to two hours before bed. For daytime focus, split the serve: two capsules with breakfast and one in the evening. ## Stacks well with Pair it with [NMN 500mg](/product/nmn-capsules/) for cellular energy, or [Korean Red Panax Ginseng](/product/korean-red-panax-ginseng/) for daytime drive, and keep magnesium L-threonate as the evening anchor of your routine. Comparing your options? Read our guide to the [best magnesium supplements in Australia](/best-magnesium-supplements-australia/). ## Quality and safety Every batch is third-party lab tested for identity, potency and purity, including heavy metals and microbial contaminants, and manufactured in a GMP-certified facility. A current certificate of analysis is available on request. For adult use only. If you have a medical condition, a kidney condition, or are taking prescription medication, consult a physician before use. Do not use if pregnant or breastfeeding unless advised by your doctor. Keep out of reach of children. Do not use if the seal is broken or missing. Store in a cool, dry place.