Keto OS NAT by Pruvit | All Natural Ketones

NAT ketones by Pruvit are the most bioavailable ketone salts in the world that are made through the first and only naturally fermented process.


By using an all natural fermentation process, Pruvit has developed Keto OS NAT as the next generation in ketone technology which allows for maximum absorption into the human body. This natural process eliminates the need for unnecessary chemicals and product fillers.

Keto OS NAT is currently available in the following flavors:

  • Raspberry Lemonade
  • Splash (Watermelon-Grapefruit)
  • Heart Tart (Sweetart)
  • Lime Time
  • Swiss Cacao
  • Maui Punch
  • Blueberry Acai
  • Strawberry Peach
  • Trü Passion (Passion fruit)
  • Berry Blue (Blue Raspberry)

See our comprehensive list of limited edition NAT flavors.

Keto OS NAT Fueled by Female

Keto OS NAT Fueled By Female is a new blend of exogenous ketones, vitamins, minerals, and extracts. With a refreshing blend of citrus, this formula was inspired by females but everyone can enjoy it!

Fueled By Female comes in an array of colors and they are shipped at random, but rest assured the technology inside is all the same!

Keto OS NAT Fueled by Female

Keto OS NAT Lite

Keto OS NAT Lite is perfect for those starting out on Pure Therapeutic Ketones. These parent-approved ketones are caffeine-free and great for making frozen keto treats the whole family will love.

Keto OS NAT Lite

NAT Lite is available in these delicious flavors:

  • Giddyup Grape
  • Strawberry Jamz
  • Lil’ Lemon
  • Orange Sun
nat lite ketones flavors

NAT Liquid Ketones

In addition to the NAT powder ketones that come in sachets, NAT liquid ketones are available in on-the-go ampules. Both powder and liquid forms are made with naturally fermented ketones, taste delicious, and will put your body into ketosis in under 30 minutes.

Nat Liquid Ketones by Pruvit

So what’s different about NAT Liquid Ketones?

  • NAT liquid ketones are made with the same patented free-cell (no-salt) technology used in Keto UP energy drinks. This allows for quicker absorption.
  • Liquid ketones are sweetened with allulose, which is known for improving gut microbiome. Allulose is keto compatible and does not contribute calories or raise blood glucose compared with sucrose.
  • Liquid ketones first launched in Mexico and are currently available in these flavors:
    • NAT Dulce Agrio (Sweet and Sour)
    • NAT Limonada Dulce (Sweet Lemonade)
    • NAT Pera Dulce (Sweet Pear)
    • NAT Mango Piña (Mango Pineapple)
    • NAT Kiwi Limon (Kiwi Lemon)
    • NAT Naranja (Orange)
    • NAT Hibisco (Hibiscus Lemonade)

Get the Nat20 Variety Pack!

The Pruvit Nat20 variety pack comes with 5 flavors of liquid ketones.

The Nat20 variety pack comes in 5 flavors for a total of 20 individual servings:
4x Hibisco (Charged)
4x Naranja (Charged)
4x Pera Dulce (Charged)
4x Limonada Dulce (Charged)
4x Dulce Agrio (Charged)

What Are Fermented Ketones?

Through diligent research and testing, Pruvit has discovered a way to create bioidentical ketones using a patented natural fermentation process that mimics the way our bodies produce ketones while in a state of ketosis.

Bioidentical ketones are ketones that are identical in molecular structure to the ketones that are naturally created by our body. These ketones are specifically known as BHB (beta hydroxybutyrate). The body responds to these lab created bioidentical ketones in the same manner as ketones that are produced in ketosis.

The Keto NAT formula takes the bioidentical ketone process one step further by creating exogenous ketones through natural fermentation.

Beta Hydroxybutyrate Ketone
Beta Hydroxybutyrate (Ketone)

The normal process for creating exogenous ketones requires combining multiple chemicals to achieve the final product. This process often leaves impurities that can work against the benefits of the product, and in some cases have a negative long term effect on your body.

No matter which method used, all of Pruvit’s keto products go through rigorous lab testing and DO NOT contain any impurities.

The fermentation process to produce the ketones in Keto OS NAT has no need for, and doesn’t involve, added chemicals. Only natural sources (patented) through fermentation to achieve the final product.

Watch the video below to discover the secret to what makes the NAT formula so amazing!

What Makes Keto OS NAT Better?

What makes fermented ketones better for you?

  • The elimination of preservatives and additives. No more chance of impure bi-product left over from the manufacturing process.
  • Better cellular signaling throughout the body between ketones and how they are being utilized.
  • People who may experience digestion issues, diarrhea, or nausea while taking ketones in the past, no longer feel the same GI disruption while taking naturally fermented ketones. This means no more incremental dosing to become adapted to ketones.
  • Lab tests have shown a higher increase in blood ketone levels. Because the fermented bioidentical ketones are extremely well absorbed into the body.
  • More natural flavor, and no more bad aftertaste.
Pruvit NAT Ketones

Keto OS NAT Benefits

Here are just a few of the prominent benefits of NAT ketones.


KETO//OS NAT and its proprietary N8 Max NAT Blend with patent-pending KetoNAT BHB salts, facilitates quick absorption of ketones which allows a state of ketosis to be reached faster than ever.

DNA Repair with C-Med 100:

The unique C-Med 100 signaling blend supports and maintains healthy cell function, maximizes cell debris removal, and extends DNA telomere length for longevity, promoting rapid repair and recovery for the human body.

Fat Loss:

With increased appetite suppression, NAT ketones help to burn fat by controlling your hunger and reducing your urge to snack.

Energy and Focus:

As a natural fuel source, your body easily absorbs and is able to utilize ketones as clean energy for your body and mind.

10 Useful Tips For Taking Ketones:


It is important to hydrate. 75% of people are chronically dehydrated. Taking Keto OS or beginning a ketogenic diet can deplete your electrolytes so it is important to drink more water and add sea salt to your food. This will help replenish your electrolytes.


We recommend everyone begin with 1/2 serving of Keto OS NAT. For some, starting to take ketones can cause very temporary GI (Gastrointestinal) discomfort. If this is the case, repeat a 1/2 serving per day until your body is acclimated, or start with a 1/4 serving.


Keto OS can be taken with Fat Coffee or Keto KREME in coffee or hot tea while following an intermittent fasting plan.


Studies show that even just light exercising can increase ketone production and absorption in the body.


Keto OS can be taken on an empty stomach or with food.


Ketone urine strips should be dipped in the urine at full concentration rather than held under a stream of urine or dipped in a diluted urine sample.


Using a ketone blood meter and strips is the most effective way to measure ketone blood levels.


Eat more avocado and spinach. Take a calcium / magnesium / potassium supplement to assist with hydration levels and to prevent cramping.


Adding vitamin K2 and Lypase enzyme can help with any GI discomfort.


As with any diet changes, if you have any medical conditions, please consult your doctor.

Also, be sure to check out the benefits of therapeutic ketones through various scientific research and reports.

Keto OS NAT Ingredients

N8 Max NAT Blend:  KetoNAT (R-Beta Hydroxybutyrate, L-Taurine, Fermented L-Leucine, C-Med 100).

Other Ingredients:  Sodium, Magnesium, Calcium, Erythritol, Citric Acid, Natural Flavor, Rebaudioside A (Stevia Extract), Caffeine (Charged Version), Vitamin B6, Vitamin B12, Vegetable Juice Color, Xanthan Gum, Beta Carotene.

Dairy-free, Gluten-free, Vegan, and Non-GMO.

Note: Ingredients may vary based on each individual product line.

How To Buy Keto NAT

So now that you’ve heard about the many benefits of Pruvit ketones, how or where can you purchase product? Here are some tips to help start your first order

  1. Purchase online with a Pruvit Referrer Code:
    • You’ll need to enter Pruvit referrer code “GETFUEL” to get access to make a purchase from the Pruvit ShopKeto website.
  2. Order now via our Pruvit affiliate website:
    • Because we here at are authorized to sell Pruvit Keto products, you can simply purchase through our affiliate Pruvit website.
Nat Ketones

Did you know? The “NAT” in Keto//OS NAT stands for “Nutritionally Advanced Technology.”


All of the NAT flavors are gluten-fre, dairy-free, and yes, vegan friendly. Here is the official answer from the product description on the website…

“Is KETO//OS® Vegan? Yes, our Keto OS//NAT is vegan friendly as we use naturally fermented ketones and amino acids”

Because the Keto NAT ketones are made using a natural fermentation process, the need to mask the ketones with sweeteners and flavoring is much less. This eliminates any bad aftertaste that can come from drinking ketones that are bound to minerals like sodium.

KETO//OS Max will eventually be phased out for the patented KetoNAT™ BHB formula and be rebranded as KETO//OS NAT. However, NAT is available to purchase online now in limited quantities via the Pruvit online store.

Pruvit is planning on adding the Keto NAT ketone formula to all of the products that contain exogenous ketones (KETO//KALM, BETTER//BROTH, KETO//OS UNLEASHED, ect). These products will retain their brands, and simply get the upgraded formula.

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