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506 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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​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 508 Reviews
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Filter Reviews:
Maisie J.
United States United States

Great as a sleep aid!

I love it. It took a few weeks before I noticed better sleep. I will definitely continue these!

Genie S.
United States United States


Fine Magnesium is good for helping you relax to go sleep. It’s also good for keeping you regular.

Larry A.
United States United States

Mag-Key for sleep.

I am a male, 80 years old. For over two years now, I have taken 4 Mag-Key capsules before bedtime to help me stay asleep longer. Being a data-guy, I have daily recorded the times I woke up to go to the bathroom. If I sleep at least 90 minutes between getting up, I deem that “good sleep”. Two years ago, I was getting a monthly average of about 55% "good sleep," and now I am consistently getting 95% and have more energy during the day.

Sandra S.
United States United States

Mag Key is the best magnesium

I have taken Mag Key for all the magnesium benefits from sleeping better to muscle recovery to better digestion. I used it for a few years and then lost my job I had. I had limited funds so I chose a cheaper brand that didnt have all the kinds of magnesium and noticed a complet difference in sleep and digestion unless I took a lot more capsules of the cheaper brand. I started taking Magnesium Key again this last year and there’s such a definite difference for the better that I’m putting it as a priority in my budget so that I can keep taking Magnesium Key

Ben C.
United States United States

Mag-Key is AMAZING!!! Hands down the BEST Magnesium supplement on the market.

Since I have high blood pressure and a family history of heart disease, I've taken Magnesium every day for as long as I can remember. For years I was taking an over-the-counter brand from the pharmacy, but after trying Mag-Key, I'll never use anything else. I feel so much better and have so much more energy throughout the day, especially as I get older since switching over to Mag-Key.

Renee F.
United States United States


I do love this. I feel better all the time. I just wish it was enough to not let me get sick with a cold. But I do love it.