Magtein, Cognitive Support, Magnesium L-Threonate, 90 Veggie Caps, Now Foods

Now Foods Magtein® — 2,000 mg of Magtein® (Magnesium L-threonate) per serving, delivering 144 mg of elemental magnesium (36% DV). Magtein® is a patented, clinically researched form of magnesium specifically developed to cross the blood-brain barrier — the only form of magnesium shown to effectively raise magnesium levels in the brain. Supports memory, learning, cognitive function, and a relaxed mood. Vegan, GMP quality assured. 90 veggie caps — 30 servings.

What makes Magtein® different from regular magnesium?

Magnesium is essential for over 300 biochemical reactions in the body — but most people don’t realise it’s also critical for brain health.

Magnesium plays a key role in maintaining the density and stability of neuronal synapses — the connections between brain cells that underpin memory, learning, and cognitive function. The problem is that most forms of magnesium (magnesium oxide, citrate, glycinate, etc.) are poorly absorbed into the brain. They raise magnesium levels in the blood and body tissues, but struggle to cross the blood-brain barrier in meaningful amounts. 

Magtein® (magnesium L-threonate) was developed by researchers at MIT specifically to solve this problem. By binding magnesium to L-threonate — a metabolite of Vitamin C — scientists created a form of magnesium that readily crosses the blood-brain barrier and effectively raises magnesium concentrations in the brain. Laboratory and clinical studies indicate that Magtein® supports brain health, synaptic density, memory, learning capacity, and a relaxed, calm mood.

Who is this for?

• Anyone wanting to support memory, learning, and cognitive performance
• Those experiencing brain fog, poor concentration, or age-related cognitive decline
• People under chronic stress — stress depletes brain magnesium
• Those wanting to support a calm, relaxed mood and better sleep
• Anyone interested in evidence-based cognitive support supplements
• Those who have tried other magnesium supplements but want one specifically targeted at brain health

Key benefits

• Magtein® (Magnesium L-Threonate) 2,000 mg per serving
• Elemental Magnesium 144 mg — 36% DV — from Magtein®
• Patented form — the only magnesium shown to effectively cross the blood-brain barrier
• Developed by MIT researchers specifically for brain magnesium support
• Supports synaptic density and stability — the foundation of memory and learning
• Supports memory and learning capacity
• Supports cognitive function and mental clarity
• Supports a relaxed, calm mood
• Supports healthy sleep — especially when taken before bed
• Vegan, GMP quality assured
• Free from wheat, gluten, soy, milk, egg, fish, shellfish, and tree nuts
• 90 veggie caps — 30 servings at 3 capsules daily
• By Now Foods — trusted natural supplements since 1968

Important caution

• Magtein® may cause sleepiness, drowsiness, or headaches when first starting — this is normal as the brain adjusts to increased magnesium levels. Start with a lower dose if needed and increase gradually. Reduce dosage or consult a doctor if symptoms persist for more than one week.
• For adults only. Consult your physician before use if pregnant, nursing, taking medication, or have a medical condition.

Formula

Each serving (3 veggie caps) delivers:

• Magnesium (from Magtein® Magnesium L-Threonate): 144 mg | 36% DV
• Magtein® (Magnesium L-Threonate): 2,000 mg

Supplement facts

Serving size: 3 veg capsules | 30 servings per container

Other ingredients

Cellulose (capsule), rice flour, magnesium stearate (vegetable source), silica. Free from wheat, gluten, soy, milk, egg, fish, shellfish, and tree nuts. Vegan.

How to take — the recommended protocol

Take 3 capsules daily in divided doses for best results:

• 1 capsule during the daytime — preferably mid-afternoon
• 2 capsules approximately one hour before sleep

This split-dose protocol is designed to support daytime cognitive function while maximising the sleep and relaxation benefits of the evening dose.

Why trust Now Foods

Family owned since 1968, Now Foods is one of the most trusted names in natural supplements — committed to making high-quality, affordable supplements that are GMP quality assured, rigorously tested, and never compromised on ingredients.