Keto OS Max Review 2018: Skyrocket Your Energy During Ketosis

Review Date: November 11, 2017

Rating: 3.4/5 stars

Things We Liked

  • Starts working within minutes
  • No need to drastically modify your diet
  • Enhances cellular regeneration, longevity, and energy levels
  • Improves your mood
  • Decreases inflammation

Things We Didn't Like

  • The price is not reasonable
  • May cause stomach upset in some people
  • The taste is not as pleasant as it claims to be 


Are you ready to reach ketosis in a fast, easy, and healthy fashion? This is the goal of Keto OS Max by Pruvit, a product that facilitates ketosis initiation thanks to its Beta-Hydroxybutyrate (BHB) content. Comes in a Swiss Cacao and Maui Punch flavors. 

This exogenous ketones formula is for people who wish to get into ketosis even if still taking some carbs. When combined with physical exercise, the rise in your blood ketone levels will help you lose fat safely and efficiently, as well as boost testosterone.

Pruvit is the proud owner of a certificate of analysis for the efficacy, purity, and consistency of their ketone products and supplements.

By using pregnenolone cream or pregnenolone supplements, the levels of the compound in the body increases, and this brings about various benefits such as fatigue relief, and delay of the aging process.
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About The Brand

Pruvit is a pioneer in the development of ketone products. The University of South Florida has approved a Pruvit application to get the sublicense rights to utilize patent-pending technology for the manufacture of ketone supplements. Most of their keto products come in powder form.

Keto OS or Ketone Operating System is Pruvit’s flagship product, the very first supplement the company started selling in 2014.

Main Ingredients

This review is dedicated to Pruvit's two most famous products -- the Keto OS Max Maui Punch and the Keto OS Max No Caffeine formulation. Both products contain the same ingredients, the only difference is the caffeine content. 

The following ingredients are responsible for the effects of the said Pruvit products, such as appetite suppression, boost in energy levels, improved physical performance, and enhanced fat loss.

1. Beta-Hydroxybutyrate (BHB)

This ingredient is a ketone that is naturally synthesized by the liver during the first fasting stage of ketosis. The results of a study done on Sprague-Dawley rats showed that exogenous ketone supplementation leads to a fast and sustained elevation of BHB, thus allowing to reach ketosis easier. Additional effects include a slight change in lipid biomarkers and decrease of blood glucose levels.

2. Malic Acid

Malic acid is present in fruit and vegetables, but the human body can also produce it by converting carbohydrates into energy. In the Keto OS formula, this ingredient is present to boost energy levels.

3. L-Taurine

Another fairly popular component of numerous weight loss supplements, taurine is an amino acid naturally found mostly in fish and meat. It controls the metabolism of water and minerals, and studies affirm that it can also boost athletic performance

4. Stevia

This natural sweetener is derived from the leaves of Stevia rebaudiana, a plant native to the Brazilian rainforests. 200 to 400 times sweeter than sugar, it has zero carbs whatsoever, thus widely used to improve the taste of diet and fitness supplements.

5. Caffeine

This ingredient is present in the formula for its energy-boosting properties. However, some people are sensitive to stimulants or just don’t want caffeine in their diet. Pruvit is aware of this, thus created a non-caffeinated version of Keto OS


The main goal of exogenous ketone products like Keto OS Max is to help you get into ketosis faster and easier, as well as support you during your ketogenic diet.

However, the specific effects of Keto OS Max may vary due to the individual feats of each dieter. Some people reach fabulous results, others are left with an average outcome, you won't know if you don't try. But, of course, you can boost the effectiveness of Keto OS by making sure you stick to a low-carb diet.

Various studies have confirmed that this nutritional approach has a concrete biochemical and physiological basis and can promote effective weight loss together with enhancement of several cardiovascular risk parameters.

Ketosis may boost cellular regeneration, energy, and longevity. A study proves that nutritional ketosis improves cell formation and cellular resilience.

Improved physiology brings forth optimal testosterone levels as well. Additionally, preliminary studies indicate that the keto diet may improve cognition. It’s no surprise that after the first few days of taking the powder, some users reported in their Keto OS reviews that they feel much more productive, energetic and focused. 

Another common effect of taking Keto OS is frequent urination. If you happen to experience this, don't worry: it's just part of the process when your body flushes out your stored glycogen.

This may affect your sodium levels, and that's why Pruvit increase the sodium content of their products. Some first-time users may experience muscle aches and nausea. Also, having a headache is quite common during the first few days of taking this product.

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How To Use

If this is your first time taking Keto OS, start with half a packet once a day for one to two days. Give your body some time to get used to this new substance! From the third day on, gradually increase the dosage to half a packet in the morning and the other half in the afternoon.

Add the powder into 10 to 20 ounces of water and remember that the amount of liquid affects the taste of the mix. In other words, use less water if you want it sweeter. Also, experienced Keto OS users suggest adding ice before shaking, as it greatly improves the final taste.

Drink the mix slowly, over some 30 to 60 minutes. If you do it faster, your body might not absorb the ketones properly, resulting in nausea and upset stomach.

Last but not least, keep in mind that while using Keto OS it's very important to stay well hydrated. Do your best to drink at least 1.5 to 2 liters (50 to 70 ounces) of water per day.

The Verdict

Both the Charged and the no-Caffeine version of Keto OS from Pruvit are food supplements well backed by scientific studies. They are quite effective and have no significant side effects you should be afraid of experiencing.

So, if you are looking for a science-proven weight loss product that does not require you to modify your diet drastically, the Pruvit Keto OS is a great shot.

Things We Liked

  • The product puts your body into a fat-burning state of ketosis within 30 minutes. This state could last for up to 5 hours depending on the response of your body.
  • You can enjoy the benefits of having ketones in your bloodstream without drastically changing your diet. Of course, you still have to eat healthy but there will be no need to subsist on fat alone.
  • You can feel the effects almost immediately: boosted energy, improved mood, and enhanced physical performance. 
  • During Ketosis, the body produces less reactive oxygen species which are known to contribute to inflammation. Thus, taking Keto OS Max reduces inflammation.

Things We Didn't Like

  • There are similar products that don't cost as much.
  • If you have a sensitive stomach, you may feel discomfort.
  • The taste is not as good as it claims to be. However, this is to be expected in most keto supplements.

Image Credits:

Adam Pius (Research Analysis)

My Trainer Bob was founded by Adam to supply a great resource on fitness and health and to become a trusted resource where people can come and learn how to stay fit.

Ivan Kokhno (Editor)

Ivan is a medical doctor that has five years experience in researching and writing health-related content, SaaS companies, startups, motivation and self-growth resources. He also speak five languages. Therefore, he is able to research any topic five times better than the average writer.