Peptide-Powered Magnesium
Our magnesium is bound to 18 amino acid peptides derived from spirulina, delivering magnesium in a peptide-powered form designed for absorption your body recognizes.
The Longevity Rx List
5 Reasons You're Still Waking Up Tired
Why a full night's rest keeps slipping away, and the peptide-powered mineral to take before bed to support deep, restorative sleep.
Written ByDr. Will ColeFunctional medicine, founder of Longevity Rx
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Formulated by Dr. Will Cole. Featured In
Reason 1
It's Not a Willpower Problem.
You go to bed on time. You skip the late scroll. And you still find yourself staring at the ceiling at 3am, wide awake for no reason you can name.
Here's what most sleep advice misses: everyday stress, poor diet, caffeine, alcohol, and lack of quality sleep all deplete your body's magnesium stores. The mineral your nervous system leans on to wind down is quietly running low, and no bedtime routine can discipline your way around it.
Low magnesium can feel like:
- Restless, broken sleep
- Fatigue that lingers all day
- Tension and mood swings
- Brain fog
Reason 2
The Mineral Your Nights Run On.
Magnesium supports over 300 critical enzymatic reactions in your body, including the ones that quiet your nervous system when the day is done. It helps regulate neurotransmitter function, muscle relaxation, and stress recovery, the exact machinery a full night's rest depends on.
When your stores run low, that wind-down system runs on fumes. Restoring them works with your body, not against it. It's why magnesium is best taken in the evening, when your body is preparing for its deepest repair work.
Reason 3
Designed for Absorption. Not Just Labels.
A magnesium supplement only helps with the amount your body actually absorbs and uses. That's the difference between an impressive label and a night you feel.
Basic mineral support stops at the milligram count. Mag18 goes beyond it, with amino acids for optimal absorption and magnesium-activating enzymes critical to vitamin D3 metabolism, delivering the deep replenishment your body craves.
Basic Mineral Support
- One standard form of magnesium
- Counts milligrams on the label
The Mag18 Difference
- 18 forms, each bound to amino acids for superior absorption
- Whole-food magnesium chelate your body recognizes and uses efficiently
- Paired with D3 and K2 so minerals go where they're needed
Reason 4
Peptides Change the Absorption Math.
Mag18 is the only peptide-powered magnesium available today. Each of its 18 forms of magnesium is bound to amino acid peptides derived from hydrolyzed spirulina, a form your body recognizes and uses efficiently.
Its unique spirulina-based process activates enzymes that continue working long after you take it. The result is deep, restful sleep support without grogginess or crashes, plus a calmer, more resilient mood the next day.
Reason 5
Better Nights Are Just the Start.
The same mineral machinery that runs your sleep also supports your bones, heart, and immune system. Mag18 pairs its magnesium with vitamins D3 and K2, so minerals are absorbed well and used where your body needs them most.
It's also fortified with zinc, selenium, copper, and chromium to support immunity, enzyme activation, and blood sugar balance. One evening habit, whole-body support.
Bone Strength
Supports strong bone and skeletal health
Heart Health
Improve cardiovascular health
Immune Defense
Supports immune function
Mental Clarity
Boost mental clarity and increase relaxation
What's Inside
Formulated by Science. Fueled by Nature.
Carefully formulated with whole magnesium chelate, essential vitamins D3 and K2, organic spirulina, and beet root. These ingredients support deeper sleep, strong bones, cardiovascular health, and overall wellness.
Vitamin D3
Essential for calcium absorption, hormone balance, and immune resilience, especially when paired with K2.
Vitamin K2
A crucial partner to vitamin D, K2 ensures minerals are used where your body needs them most.
Zinc
Essential for immune health, hormone regulation, and healthy skin, balanced to work in harmony with copper.
Member Results
The Mag18 Difference.
Results based on a survey including n=235 LongevityRx members evaluating self-perceived efficacy.
Your Nights, Restored
Start Sleeping on Mag18.
Take it in the evening with food. Peptide-powered magnesium with D3 and K2, on your schedule.
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One-Time Purchase
$69.95
A single bottle. No subscription.
- Try it on your own schedule
Doctor-Formulated
Third-Party Tested
Certified Non-GMO
No Artificial Additives
Made in the USA
Frequently Asked Questions
What makes Mag18 different from other supplements?
Mag18 is more than just magnesium. It's a full-body balance formula combining highly bioavailable whole-food magnesium chelate with vitamins D3 and K2, plus superfoods like spirulina and beet root. This synergistic blend supports your bones, muscles, mood, heart, and immune system, making Mag18 a daily essential.
What are some of the benefits of taking Mag18?
It's a foundational supplement for feeling calm, strong, and centered every day. With daily use, Mag18:
- Strengthens bones by enhancing calcium absorption and directing it where it belongs
- Supports muscle recovery and relaxation
- Improves sleep quality and stress resilience
- Enhances cardiovascular health and proper blood flow
- Boosts mood and mental clarity through neurotransmitter regulation
How should I take Mag18?
Take Mag18 once daily with food, preferably in the evening if you're using it to support sleep and relaxation. It's easy to add to your daily wellness routine and plays well with other Longevity Rx products.
Who should take Mag18?
Anyone experiencing stress, poor sleep, muscle cramps, or signs of magnesium deficiency (like irritability or low energy) can benefit. Mag18 is also ideal for those looking to support bone strength, heart health, and stress resilience at any age.
How and where should I store Mag18?
Store Mag18 in a cool, dry place, away from heat and direct sunlight. Keep the container sealed between uses to preserve freshness and potency.
What measures do you take to ensure the quality of Mag18?
Mag18 is crafted in a GMP-certified facility and undergoes third-party testing for purity, potency, and quality. We use clean, bioavailable forms of magnesium, D3, and K2, with no artificial additives or unnecessary fillers, so you get exactly what your body needs, and nothing it doesn't.