Z Optima


4.78 out of 5

Benefit Of Using Z Optima

  • Anabolic Mineral Support
  • May Improve Muscle Strength & Endurance
  • May Accelerate Healing & Tissue Repair
  • May Promote Deep Restful Sleep
  • May Maximize Recovery & Growth
  • May Increase Free Testosterone Levels
  • May Enhance Recovery During Sleep
  • University Lab Studied

The Minerals you’ve Been Missing: Sleep deeper, recover faster, and increase muscle mass*

While NutraKey’s Z-Optima is just a simple mineral formula, supplementing with zinc and magnesium have long been known as on the most effective ways to increase lean muscle mass, speed up recovery, and boost testosterone.1,2,3,4 From professional athletes to amateur bodybuilders, the Z-Optima formula is one of the least-contested and most effective supplements on the market.

Sleep Deep, Recover Faster

Primarily used to help promote recovery and growth while sleeping, Z-Optima does far more than provide your body with the necessary ingredients for muscle repair and a good night’s rest.

By stimulating the activity of enzymes throughout the body, zinc has been found to be a critical component of protein synthesis and the recovery/growth process of muscle and connective tissue damaged or stressed by intense exercise.1,4,5 The addition of magnesium – an essential mineral involved in virtually all functions and areas of the body – is believed to further increase muscle size, strength, fat loss, and overall health.2,3

Studies have also demonstrated the ability of magnesium to normalize and extend stage 3 and stage 4 slow-wave sleep.2,3 This not only results in better-perceived quality of sleep, but extends the period of time when growth hormone is thought to be released at the fastest rate.

An Anabolic Powerhouse

While the ingredients in Z-Optima are not meant to directly promote testosterone and hormone production, athletes supplementing with this formula have experienced as much as a 30% increases in testosterone levels and a 5% increase in insulin-like growth factor (IGF-1) over several weeks of use.1 Athletes taking a placebo actually saw these hormone levels decrease by 10% and 20%, respectively, over the same time period.1

Furthermore, during the same study, those taking the Z-Optima formula experienced nearly 2.5x more strength gains and reported much better sleep than those taking a placebo.1

Take Your Workouts To New Heights

With the added metabolic benefits of vitamin B6, magnesium and zinc supplementation is important and effective for healthy growth in both athletes and bodybuilders alike. NutraKey’s Z-Optima formula has been clinically proven to significantly increase anabolic hormone levels, increase both free and total testosterone, boost muscle strength, and promote deep, replenishing sleep.


  1. Brilla, L. R. and Conte, V. Effects of a Novel Zinc-Magnesium Formulation on Hormones and Strength. Journal of Exercise Physiology online. 3 (4): 2000.
  2. Brilla, L. R. and Haley, T. F. Effect of magnesium supplementation on strength training in humans. J Am Coll Nutr. 1992 Jun;11(3):326-9.
  3. Cinar, V., et al. Effects of magnesium supplementation on blood parameters of athletes at rest and after exercise. Biol Trace Elem Res. 2007 Mar;115(3):205-12.
  4. Kilic, M., et al. The effect of exhaustion exercise on thyroid hormones and testosterone levels of elite athletes receiving oral zinc. Neuro Endocrinol Lett. 2006 Feb-Apr;27(1-2):247-52.
  5. Mocchegiani, E., et al. Zinc, metallothioneins, and longevity—effect of zinc supplementation: zincage study. Ann NY Acad Sci. 2007 Nov;1119:129-46.

Weight .5 lbs
Dimensions 2.5 x 2.5 x 4.5 in

12 reviews for Z Optima

  1. :

    I have been taking this for a week before bed and what I noticed is that every morning, I wake up refreshed and get up immediately. Previously, I had trouble getting up in the mornings and was always fatigued. That laggish-feeling and struggle to get out of bed in the morning has gone away! I wake up feeling rested and I enjoy my sleep a lot better now. I can attribute this to z-optima and i recommend it to anyone who has a tough workout regimen like myself. It will help!

  2. :

    Really happy with the product and will continue to purchase!

  3. :

    Wasn’t really sure about the importance of zinc and magnesium for active people. The recovery I feel, the energy I feel when I wake up its amazing. Not to mention it helps with fat loss while sleeping.

  4. 5 out of 5


    Quite possibly one of my favorite Nutrakey products… I’ve slept much better since I started taking it. I’ve always had trouble sleeping but this seems to help. On top of that, I feel extremely energized the following day, especially during my workouts. I take this product religiously and it is definitely showing.

  5. 4 out of 5


    I buy and use this product on a regular basis, it helps me fall asleep within about 30 minutes and I rarely wake up in the middle of the night. This is important to me because I am a big coffee drinker and I workout at night and I find that this winds me down afterwards.

  6. 5 out of 5


    I 100% agree with the others here. I crashed hard and had some crazy dreams! Scary at points lol but that is very deep REM sleep. Still wake sometimes, will get the melatonin to go with this next time!

  7. 5 out of 5


    This product does exactly what it says it does! Deep, uninterrupted sleep with no hangover! Cant beat it!

  8. 5 out of 5


    I have slept a great deal better since I started taking Z-Optima. Sleep=Recovery and I have been feeling better throughout the day because I am actually sleeping through the entire night. The dreams are nuts too!

  9. 5 out of 5


    I am soon to be 47 and just getting back into the gym. I did some reading on ZMA and was curious as I have had problems waking up during the night, and after taking Z-Optima I have slept incredibly well and also experiencing less muscle soreness after my workouts. Also, I am a police officer and at times I don’t always get a full nights sleep, Z-Optima seems like it maximizes the sleep that I do get.

  10. 4 out of 5


    helped me fall asleep but had the weirdest dreams I’ve ever had

  11. 5 out of 5


    Felt immediate results. Most pronounced in the restful sleep area. I have trouble getting deep sleep but this put me OUT! (beware of dreams lol)

  12. 5 out of 5


    if it dont work ur not using it right

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