Liposomal Magtein® – Magnesium L-Threonate for Brain, Mood & Sleep

The Quicksilver Advantage

Unlike most magnesium supplements, Magtein (magnesium L-threonate) is clinically proven to cross the blood-brain barrier. Paired with Quicksilver’s advanced liposomal delivery, it delivers superior absorption, targeted cognitive support and fast-acting benefits. We’ve supercharged brain function by adding 450 mg of high-purity phosphatidylcholine (PC) per serving—a vital phospholipid for neuronal membrane support and healthy neurotransmission. The powerful combination of Magtein + PC helps fuel cognition and neuroplasticity supporting long-term brain health. Elevate your mental game with Magtein + phospholipids delivered in a liposome - an unmatched formulation for brain performance and mental well-being.‡

A Higher Standard of Liposomal Delivery with QDS®️
The Quicksilver Delivery Systems®️ signature trademark sets our liposomal products apart from other companies and ensures high absorption and bioavailability.

Our products' clear consistency can only be achieved with liposomes that are small (20-100 nanometers) and stable enough to pass between cells. These small vesicles begin absorbing as soon as they hit your mouth, so you can get high absorption of the product before it is altered by the harsh processes in the digestive system.

‡These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

Information provided by this website or this company is not a substitute for individual medical advice.

• Best taken daily. Take 5mL in the daytime and 10mL one hour before sleep for best results.
• Hold in mouth for 30 - 90 seconds before swallowing.
• Store product at room temperature.
• If pregnant, breastfeeding, or taking prescription drugs, consult your healthcare practitioner before use.

Magtein®

Supplement Facts
Serving Size: 15 mL
Servings Per Container: 30

Amount Per Serving

• Magnesium (elemental) (from 1000 mg Magnesium L-Threonate as Magtein®) — 72 mg (17% Daily Value)
• Phosphatidylcholine (from highly purified phospholipids) — 450 mg (Daily Value not established)
  
  Other Ingredients:
  Water, glycerin, ethanol, acacia gum, natural citrus oils, citric acid

What is magnesium L-threonate used for?

Magnesium L-threonate is used to support cognitive function, memory, focus, and mood. It’s the only form of magnesium shown to cross the blood-brain barrier, helping improve learning, reduce mental fatigue, and enhance brain resilience over time. Liposomal Magtein® boosts these effects by improving cellular absorption.

Does magnesium L-threonate help with sleep?

Yes. This form of magnesium promotes deeper, more restorative sleep by calming the nervous system and supporting balanced neurotransmitters. Unlike other magnesium types, Magtein® works directly in the brain, helping to regulate circadian rhythms, reduce nighttime stress, and improve next-day clarity.

What makes Magtein better than other magnesium?

Magtein® is the only clinically studied magnesium that enters the brain, targeting cognitive health instead of just muscle or digestive function. Quicksilver’s liposomal delivery system enhances absorption and pairs it with phosphatidylcholine for added support to brain cell membranes and neural communication.