Momentous Magnesium L-Threonate.
2 g of Magtein magnesium L-threonate in three capsules, giving 145 mg of magnesium. A form studied for reaching the brain. Vegan and NSF Certified for Sport.
Affiliate link: if you buy through the button below, True Stack Reviews earns a commission from Momentous at no extra cost to you. How we handle affiliate links.
Price checked on livemomentous.com on November 5, 2026 (one-time purchase; Momentous showed a subscribe-and-save price of $37.49). Prices and stock change, so check before you buy.
Watch
Momentous Magnesium L-Threonate in 60 seconds.
Why it made the stack
Key takeaways.
Animal research suggests threonate raises magnesium in the brain more than other forms.
145 mg of actual magnesium, so it's not the best pick just to cover a magnesium gap.
About three times the price of our bisglycinate pick. You're paying for the brain research.
From the label
Three capsules, every number.
Here's what one serving gives you, straight from the label.
From the Momentous product page and supplement facts, checked November 5, 2026. Always read the label on the product you buy.
Momentous directions: take 3 capsules daily, about 30 to 60 minutes before bed.
What the research says
What the evidence shows.
Threonate and memory
In a 12-week trial of 44 older adults with memory complaints, a magnesium L-threonate formula improved cognitive test scores versus placebo. One small, industry-linked trial.
Liu G et al. J Alzheimers Dis 2016;49:971–990. doi:10.3233/JAD-150538
Magnesium basics
The supplement upper limit for magnesium is 350 mg a day for adults.
NIH Office of Dietary Supplements. Magnesium: Fact Sheet for Health Professionals. ods.od.nih.gov
What Momentous says
The benefit wording on the Magnesium L-Threonate product page is Momentous's own. The independent part is the third-party certification, which screens for banned substances and checks the label.
Momentous. Magnesium L-Threonate product page and supplement facts. livemomentous.com, checked November 5, 2026.
Before you buy
What you should know.
- Already in Drop 06. The Athletic Resilience Stack includes this product.
- Pick one magnesium. Don't combine with other magnesium supplements without counting the total.
- Check with your doctor first if you have kidney disease or take medicines that interact with magnesium.
Great fit if you…
- Want magnesium aimed at sleep and focus
- Don't mind paying more for the research
- Don't take another magnesium
How to take it
- 3 capsules 30 to 60 minutes before bed
- Give it several weeks
- Keep a regular bedtime
FAQ
Quick answers.
What is Magtein?
A patented form of magnesium L-threonate. Momentous uses 2 g per serving.
Is it better than other magnesium?
For brain levels, animal studies suggest so. For covering a basic magnesium gap, cheaper forms do the job.
How much magnesium does it give?
145 mg per 3-capsule serving.
Sources
- Liu G et al. Efficacy and safety of MMFS-01, a synapse density enhancer, for treating cognitive impairment in older adults: a randomized, double-blind, placebo-controlled trial. J Alzheimers Dis 2016;49:971–990. doi:10.3233/JAD-150538
- NIH Office of Dietary Supplements. Magnesium: Fact Sheet for Health Professionals. ods.od.nih.gov
- Momentous. Magnesium L-Threonate product page and supplement facts. livemomentous.com, checked November 5, 2026.
- NSF. Certified for Sport program. nsfsport.com.
This page is for general information and is not medical advice. 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.