The ketogenic diet is a low-carb, high-fat diet that has been linked to many health benefits, including weight loss and preventing age-related mental decline (1Trusted Source).
As this diet grows in popularity, a number of keto-friendly supplements have become available to consumers.
Exogenous ketone supplements are claimed to provide the benefits of a ketogenic diet even when the consumer is not following one.
Prüvit Keto OS is a brand of these supplements marketed for their ability to increase energy, boost athletic performance and reduce appetite.
This article reviews Prüvit Keto OS supplements and explores the evidence behind exogenous ketones.
Keto OS supplements are made by Prüvit, a self-proclaimed worldwide leader in ketone technology.
Keto OS, which stands for “Ketone Operating System,” is an exogenous ketone drink offered in a variety of flavors.
It comes as a powder in both bulk containers and “on-the-go” (OTG) packets and is meant to be dissolved in cold water.
Prüvit recommends that a heaping scoop of Keto OS be mixed with 12 to 16 ounces of cold water and taken once a day for therapeutic benefits or twice a day for “optimal performance.”
What Are Ketones?
Ketones, or “ketone bodies,” are compounds produced by the body as an alternate energy source when glucose (blood sugar) is unavailable to use for fuel (2Trusted Source).
Examples of times when the body produces ketones include starvation, prolonged fasting and ketogenic diets. In these situations, the body goes into a metabolic state called ketosis and becomes very efficient at burning fat for energy.
In a process called ketogenesis, the liver takes fatty acids and converts them to ketones for the body to use as energy.
During times of low blood sugar availability, these ketones become the main energy source for tissues able to break them down, including brain and muscle tissue.
The ketones made during ketogenesis are acetoacetate, beta-hydroxybutyrate and acetone (3Trusted Source).
There are two types of ketones:
- Endogenous ketones: These are ketones made naturally by the body through the process of ketogenesis.
- Exogenous ketones: These are ketones supplied to the body by an external source like a nutritional supplement.
Most exogenous ketone supplements, including Keto OS, use beta-hydroxybutyrate as their exogenous ketone source because it is used most efficiently by the body (4Trusted Source).
What Are Ketone Supplements?
There are two forms of exogenous ketone supplements:
- Ketone salts: This is the form found in most ketone supplements available on the market, including Keto OS. Ketone salts contain ketones that are most commonly bound to sodium, calcium or potassium to increase uptake.
- Ketone esters: Ketone esters are primarily used in research and are not currently available to consumers. This form consists of pure beta-hydroxybutyrate without other additives.
Aside from beta-hydroxybutyrate, Prüvit Keto OS supplements contain caffeine, MCT (medium-chain triglyceride) powder, malic acid, ascorbic acid and the natural, zero-calorie sweetener Stevia.
Prüvit Keto OS supplements are gluten-free but do contain milk ingredients.