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502 reviews

120 capsules (30-day supply)

Original price $29.45 - Original price $29.45
Original price
$29.45 - $29.45
Current price $29.45

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Get Mag-Key for $26.51 each when buying 3 or more!

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​Full Spectrum Magnesium Supplement

Mag-Key contains four highly absorbable forms of Magnesium + B-6 with targeted health benefits: 

  • Heart Health*
  • Stress relief*
  • Sound sleep*
  • Constipation relief*

This targeted delivery system focuses broadly on your body, and more specifically on your mind, and muscles—especially your heart.


An essential mineral involved in over 350 of the body's critical functions, magnesium is probably the most important yet deficient mineral in the body these days.*

Magnesium provides vital support to help:

  • Aid in stress relief and energy production*
  • Alleviate constipation*
  • Assist with sound sleep*
  • Support healthy blood pressure*
  • Support strong bones*
  • Aid in a healthy insulin response*

Could you be low on magnesium? 

Some of the most common symptoms include:

  • Fatigue
  • Muscle cramps
  • Muscle twitches
  • Headaches
  • Stress
  • Anxiety
  • Constipation
  • Irregular heartbeat
  • Sleep problems

Thanks to a blend of four powerful forms of magnesium, Mag-Key is able to support a wide range of health benefits - all from a single easy-to-take supplement.

Key Ingredients

Magnesium Glycinate

for your mind

  • Soothes nervousness, irritability, trouble sleeping, and lack of concentration*
  • Minimizes laxative effects and is the least likely form to induce diarrhea*
  • Corrects long term deficiencies*
  • Reduces numbness and crying*
  • Increases mental calmness and relaxation*

Magnesium Malate

for your muscles

  • Supports comfortable joints and nerves*
  • Calms muscle fatigue and restlessness*
  • Supports digestion (so take with meals)*
  • Increases energy production*

Magnesium Taurinate

for your heart

  • Supports healthy heart function*
  • Relieves headaches*
  • Suppresses heart palpitations and arrythmias*

Magnesium Orotate

for your body

  • Enhances athletic performance*
  • Boosts DNA formation and heart repair and function*

Vitamin B6

Supplementing with B6 is important to optimize absorption and assimiliation of magnesium.

Full List of Ingredients

Other ingredients: Vegetarian Capsule (Hypromellose and water) and microcrystalline cellulose.

portrait of Ann Louise Gittleman

I’m a big believer that everyone should supplement with high-quality magnesium. And for good reason.

A recent study from the National Institutes of Health suggests nearly 8 in 10 Americans don’t get enough magnesium.

And because your body requires magnesium for over 300 processes -- everything from your heartbeat to your metabolism -- low magnesium can cause all sorts of problems. And that's where supplementation can make a big difference.

Of the many, many magnesium supplements on the market, Mag-Key gets my vote because it’s the only one I’ve seen that includes four UNIQUE forms of magnesium - malate, orotate, glycinate and taurinate!

Ann Louise Gittleman, PhD, CNS
UNI KEY Health Brand Ambassador

Our Customers Say It Best

Suggested Usage

Take two (2) capsules twice daily, or as directed by a health care professional. Store tightly closed in a cool, dry place.

Why Buy from UNI KEY Health?

Our Quality Promise

Mag-Key is manufactured in the USA at a Good Manufacturing Practices (GMP) and FDA registered facility. Each finished product undergoes stringent purity, potency and heavy metal testing.

Every batch of Mag-Key is then third-party tested to confirm it meets the highest standards for purity, and every third batch is third-party tested for heavy metals.

100% Satisfaction Guarantee

We believe you’ll love the many benefits of Mag-Key!

And you can try Mag-Key today with complete confidence thanks to our 100% Satisfaction 90-Day Money-Back Guarantee.

If you’re dissatisfied with Mag-Key for any reason (or none at all) please give us a call at 1-800-888-4353 or email and we’ll make it right.

We invite you to try Mag-Key today RISK FREE!

Customer Reviews
4.8 Based on 502 Reviews
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Filter Reviews:
Marilyn C.
United States United States

The best Ive found

I have used Mag-key for years as I've never found another magnesium supplement that contains so many kinds of magnesium. Most just have 1 or 2. The thorough list of ingredients as well as the trusted source has made me very loyal to Mag-key and my whole system works better when I take it

Phyllis N.
United States United States

It helps me sleep through the night.Keeps me calm when under stressful situations and curves my cravings for chocolate.

Larry D.
United States United States

Mag-key for me

Magnesium seems scarce nowadays and Mag-key fills the bill. I noticed from the first tablet my health was going to improve. Thanks again.

Jane C.
United States United States

My most important supplement

I like this magnesium blend better than any other I have tried. No GI issues, works for what I need it for.

Karla A.
United States United States

Great sleep....and without leg cramps!

Leg cramps, specifically the seizing of my calf muscles has been an issue for me for several years. The cramping usually happens when I'm in bed for the night. I usually take 2 capsules during the day and 1 or 2 capsules before going to bed. I'm able to sleep through the night and wake up feeling rested. I was taking magnesium glycinate in the same fashion before using the UniKey Health brand but think the 4 different source ingredients work best for my body. This is a product I can't live without!


UNI KEY Health

Thank you for your great review Karla! We're so happy to hear you're feeling results with Mag-Key! We hear this a lot from our Mag-Key customers :) Thanks again! In good health, UNI KEY Staff

Dianna R.
United States United States

Magnesium Sleeps

I love MagKey! It's improved my sleep significantly