Specialized magnesium support for cognitive function, memory, focus, mood balance and a healthy sleep-wake cycle.*
RetzlerRx® Magnesium L-Threonate features Magtein®, a patented form of magnesium L-threonate developed for brain-focused magnesium supplementation. It is designed for adults seeking a more targeted magnesium formula to support mental clarity, healthy neurological function, balanced mood and restorative daily rhythms as part of a broader healthy-aging plan.*
Unlike magnesium forms commonly selected primarily for general magnesium replacement, digestive regularity or muscle support, magnesium L-threonate is used specifically in formulas focused on brain magnesium and cognitive health. Its value is not simply that it contains magnesium, but that it provides a specialized form chosen for neurological and cognitive support.*
Primary use: Cognitive function, memory, focus, mood balance and sleep-wake cycle support*
Key ingredient technology: Magtein® magnesium L-threonate
Suggested use: 2 capsules daily, or as recommended by your healthcare professional
Servings per container: Confirm from product label
Typical bottle duration: Confirm from total capsule count
Dosage form: Capsules
What Is Magnesium L-Threonate?
Magnesium L-threonate is a specialized magnesium compound commonly used in supplements designed to support cognitive and neurological function. Magnesium itself is an essential mineral involved in hundreds of enzymatic reactions throughout the body, including processes related to nerve signaling, energy metabolism, muscle function and cellular regulation.
Magnesium movement into the brain is tightly regulated. Magtein® was developed as a magnesium L-threonate ingredient for use in formulas intended to support magnesium availability within the brain and healthy neurological function.*
Who May Consider This Formula?
RetzlerRx® Magnesium L-Threonate may be appropriate for adults seeking nutritional support for:
- Memory and cognitive function*
- Mental focus and clarity*
- Balanced mood*
- Healthy brain aging*
- A healthy sleep-wake cycle*
- Occasional stress resilience*
Cognitive symptoms, sleep changes and mood concerns can have many causes. A supplement should not replace an appropriate medical evaluation when symptoms are persistent, progressive or disruptive.
Why This Formulation?
This formula uses Magtein®, a patented magnesium L-threonate ingredient selected for its use in brain-health and cognitive-support formulations. The goal is not simply to provide the greatest possible amount of elemental magnesium. It is to provide a specialized form intended for individuals prioritizing neurological and cognitive support.*
Different magnesium forms may serve different purposes. Magnesium glycinate is often selected for general magnesium support and gastrointestinal tolerability, while magnesium citrate is commonly used when digestive regularity is also desired. Magnesium L-threonate has a more specialized role in formulas centered on brain magnesium, cognition and healthy neurological function.*
How Is It Different From Less Expensive Magnesium Products?
Price alone does not determine supplement quality, and a lower-priced magnesium product is not automatically a poor product. However, products that all say “magnesium” on the front label may contain substantially different forms intended for different uses.
RetzlerRx® Magnesium L-Threonate uses Magtein®, a patented ingredient technology developed for brain-focused magnesium supplementation. Less expensive products may use magnesium oxide, citrate or other forms that can be appropriate for general supplementation but are not equivalent to magnesium L-threonate in formulation, intended use or ingredient cost.
The most useful comparison is therefore not simply price per bottle. It is the magnesium form, intended purpose, verified dose, number of capsules required and length of use provided by each bottle.
Suggested Use
Take 2 capsules daily, or as recommended by your healthcare professional.
Review the product label to confirm whether the capsules should be taken together, divided throughout the day or taken with food.
How Long Does One Bottle Last?
Bottle duration depends on the total number of capsules in the bottle. At the suggested use of 2 capsules daily:
- A 60-capsule bottle lasts approximately 30 days.
- A 90-capsule bottle lasts approximately 45 days.
- A 120-capsule bottle lasts approximately 60 days.
Confirm the total capsule count on the current product label before publishing an exact bottle duration.
Important Cautions
Consult a qualified healthcare professional before use if you are pregnant, breastfeeding, taking prescription medication or managing a chronic medical condition. Individuals with impaired kidney function should seek medical guidance before using supplemental magnesium.
Combining this product with other magnesium supplements may increase total supplemental magnesium intake. Keep out of reach of children, and confirm all product-specific allergen, storage and caution statements from the current label.
Why RetzlerRx®?
RetzlerRx® formulations are selected and developed for use within a physician-led Preventive Longevity Medicine practice. We prioritize meaningful ingredient forms and doses, responsible formulation, appropriate quality standards and clinical restraint.
Supplements are tools—not substitutes for diagnosis, medical treatment, nutrition, sleep, exercise or the other foundations of health.
Learn More About Brain Health and Healthy Aging
- Explore RetzlerRx® Longevity Supplements
- Sleep and Hormone Balance
- Inflammation and Cognitive Aging
- HormoneSynergy® Resource Library
Frequently Asked Questions
What is magnesium L-threonate used for?
Magnesium L-threonate is commonly used in supplements designed to support brain health, memory, mental focus, balanced mood and a healthy sleep-wake cycle.* It is a more specialized magnesium form than products primarily intended for general magnesium replacement or digestive support.
What is Magtein®?
Magtein® is a patented form of magnesium L-threonate developed for use in brain-health and cognitive-support formulations. It is selected for its intended role in supporting magnesium availability within the brain and healthy neurological function.*
How is magnesium L-threonate different from magnesium glycinate?
Magnesium L-threonate is generally selected for brain and cognitive-support formulations. Magnesium glycinate is more commonly used for general magnesium support, muscle function, relaxation and gastrointestinal tolerability. Neither form is universally better; the appropriate choice depends on the intended use.
Is this primarily a sleep supplement?
No. Although magnesium L-threonate may support a healthy sleep-wake cycle and calm neurological function, this formula is primarily positioned as a brain and cognitive-support product. It is not a sedative and should not be expected to treat an underlying sleep disorder.*
How do I take RetzlerRx® Magnesium L-Threonate?
The suggested use is 2 capsules daily, or as recommended by your healthcare professional. Confirm the product label for instructions regarding food or divided dosing.
How long does one bottle last?
Bottle duration depends on the total number of capsules in the bottle. At 2 capsules daily, divide the total capsule count by two to determine the approximate number of days supplied.
Can I take magnesium L-threonate with another magnesium product?
Combining magnesium products may increase total supplemental magnesium intake. A healthcare professional can help determine whether using more than one form is appropriate and ensure that the combined amount is suitable for your health history and current medications.
*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. The information provided is for educational purposes and is not a substitute for individualized medical advice.