Pack size: 90 capsules
Serving: 3 capsules
Servings per pack: 30

ShopVitamins and minerals

Doctor Life

Optimized Singles

Magtein®

Magnesium L-threonate, 2000 mg

157,99 zł

Supports normal nervous system function
Supports normal psychological function
Helps reduce tiredness and fatigue

Overview

Focused support for memory, concentration, and everyday mental performance. We developed Magtein® for adults with demanding work or study routines, people managing a heavy mental workload, and older adults who want to support normal nervous system function.

At the heart of the formula / Magtein®

Thoughtful support. Clear purpose.

01Supports normal nervous system function
02Supports normal psychological function
03Helps reduce tiredness and fatigue
04Focused support for memory and concentration
05Supports everyday energy and mental performance

Doctor Life / 01

Magtein®

Made for your daily routine.

We chose patented magnesium L-threonate, a form developed to support magnesium availability in the nervous system. This focused formula contains one selected ingredient studied in relation to cognition, memory, reaction time, and sleep. The daily serving provides 2,000 mg of magnesium L-threonate, including 155 mg of elemental magnesium.

Three capsules, taken in divided servings, fit easily into a morning and evening routine. Each bottle provides 30 days of use, with a plant-based pullulan capsule suitable for vegans. A simple formula with a clear focus.

Doctor Life / 02

Magtein®

Why does magnesium matter?

Magnesium supports normal nervous system and psychological function. It also contributes to energy metabolism and helps reduce tiredness and fatigue—important functions for demanding work, study, and everyday life. Magtein® uses magnesium L-threonate, a specialized form also studied in relation to memory, cognition, and sleep.

Doctor Life / 03

Magtein®

What does research say about Magtein®?

Research on magnesium L-threonate examines memory, attention, reaction time, sleep, and daytime function. Randomized adult trials have reported improvements in selected cognitive measures, working and episodic memory, and self-reported sleep. Some trials studied magnesium L-threonate alone; another tested a formula with additional ingredients. Earlier preclinical work explored links between brain magnesium availability, learning, and memory. Results depend on the formulation and population studied.

Ingredients / Doctor Life

Every ingredient. Clearly explained.

Each ingredient, its form and quantity — in one place.

Serving3 capsules

Ingredient amounts for the servings shown in the table.
Ingredient	3 capsules
Magnesium L-threonate (Magtein®)	2000 mg
of which magnesium	155 mg (41% NRV)

*NRV: Nutrient Reference Value

Full ingredient list

Magnesium L-threonate (Magtein®); capsule shell (bulking agent: pullulan).

How to use

Part of your daily rhythm.

How to use

Take 3 capsules daily in divided servings: 1 capsule in the morning and 2 capsules about 2 hours before bed, or as directed by a healthcare professional.

Important information

Do not exceed the recommended daily serving. Dietary supplements are not a substitute for a varied diet. A balanced diet and a healthy lifestyle are recommended. Not recommended during pregnancy or breastfeeding.

Science & sources

Understand the formula.

Selected publications explain the interest in magnesium L-threonate for memory, concentration, sleep, and everyday mental performance.

These publications concern the studied ingredients or formulas. They do not all evaluate the finished Doctor Life product, and research results do not guarantee individual outcomes.

01A Magtein®, Magnesium L-Threonate, -Based Formula Improves Brain Cognitive Functions in Healthy Chinese Adults

C. Zhang, S. Mochizuki, A. Nishi et al.

Nutrients (2022), 14(24), 5235. DOI: 10.3390/nu14245235; PMID: 36558392.

In a 30-day, double-blind, placebo-controlled study of 109 healthy adults, a magnesium L-threonate-based formula was associated with improvements in selected measures of cognitive function. The study tested a combination with additional ingredients, not the finished Doctor Life product. It nevertheless supports the rationale for a formula focused on everyday mental performance.

Read publication ↗

02Magnesium-L-threonate improves sleep quality and daytime functioning in adults with self-reported sleep problems: A randomized controlled trial

H.A. Hausenblas, R. Lynch, A. Hooper et al.

Sleep Medicine: X (2024), 8, 100121. DOI: 10.1016/j.sleepx.2024.100121; PMID: 39252819.

A randomized trial in adults with self-reported sleep problems evaluated magnesium L-threonate for sleep and daytime functioning. The favorable changes observed help explain the interest in this form for people who want to connect better rest at night with better functioning during the day.

Read publication ↗

03The effects of magnesium L-threonate (Magtein®) on cognitive performance and sleep quality in adults: a randomised, double-blind, placebo-controlled trial

A.L. Lopresti, S.J. Smith

Frontiers in Nutrition (2026), 12, 1729164. DOI: 10.3389/fnut.2025.1729164; PMID: 41601871.

In a six-week study of 100 adults taking 2 g of magnesium L-threonate daily, favorable differences were reported in overall cognitive performance, working and episodic memory, and reaction time. The study evaluated the ingredient on its own. It supports the rationale for selecting that ingredient, not a guarantee of results from the finished product.

Read publication ↗

04Enhancement of learning and memory by elevating brain magnesium

I. Slutsky, N. Abumaria, L.-J. Wu et al.

Neuron (2010), 65(2), 165–177. DOI: 10.1016/j.neuron.2009.12.026; PMID: 20152124.

This preclinical study helped explain why increasing magnesium availability in the brain became a focus of learning and memory research. The findings did not come from human studies, but they provide a mechanistic foundation for later clinical trials of magnesium L-threonate.

Read publication ↗

FAQ / Magtein®

Good questions. Clear answers.

Talk to us ↗

How do I take Magtein®?

Take 3 capsules daily in divided servings: 1 in the morning and 2 approximately two hours before bed. Alternatively, follow your healthcare professional’s advice. Do not exceed the recommended daily serving.

How long does one bottle last?

Each bottle contains 90 capsules. At the recommended serving of 3 capsules daily, it provides a 30-day supply.

How is magnesium L-threonate different from other forms?

Magnesium L-threonate is a specialized form developed to support magnesium availability in the nervous system. We chose it because it has been studied in relation to cognition, memory, and sleep, giving this formula a specific focus.

Are the capsules suitable for vegans?

Yes. The capsule shell is made from pullulan, and the product is suitable for a vegan diet.

Who is Magtein® for?

Magtein® is designed for adults who want to support nervous system function, psychological function, and the reduction of tiredness. It may be of interest to people with mentally demanding work, students, and older adults who prioritize cognitive well-being.

Why split the serving between morning and evening?

Taking 1 capsule in the morning and 2 approximately two hours before bed fits the serving into a consistent daily routine. Follow these directions or the individual advice of your healthcare professional.

Can I take it with medication?

If you take medication or receive ongoing medical care, consult your doctor or pharmacist before use. The product is not recommended during pregnancy or breastfeeding.

Doctor Life formulas