Ketosis occurs when the body generates fuel mostly by fat. Can a supplement like Keto OS help? To find out, we took a closer look at the ingredients, side effects, and clinical studies. It was easy to find hundreds of experiences to go on. Then, we narrowed and condensed to give you the info you need.
What is Keto OS?
Firstly, Pruvit Keto OS is a weight-loss supplement with MCT powder, beta-hydroxybutyrate, natural flavor, malic acid, stevia, and caffeine.  Keto OS Max offers the same, but l-leucine, l-taurine, and a few others are added. Just one scoop or packet a day is supposed to dump you into ketosis , so your body burns fat first and help with weight-loss. This is not to be confused with ketoacidosis, a medical condition that can be life-threatening. The single serving option is easy to take on the go.
Pruvit, the makers of Keto OS, started online in 2013. You have various options to choose from on the official website including a canister of powder or prepackaged servings, which makes the Keto Os diet a bit easier. We like the addition of caffeine but read on…
Taste – “Not Exactly Good?”
The first issue we found with Keto OS ingredients came with a taste that was unpleasant to some. “If you have a product you are supposed to drink it needs to be something you like,” says our Research Editor. “Customers say this one isn’t like that.”
“It tastes like 10 packets of sweet and low in one glass of water, tastes very unnatural I would rather drink dirt,” one user explains.
“No changes occurred in a week! It tastes awful and only gave me headaches,” a buyer describes. 
Another says, “Couldn’t even drink.”
While some talked about the flavor, others only offered positive comments.
“Taste is good, added extra ice and made in blender,” said a dieter.
Another said, “The Orange Dream, which tastes like an orange dreamsicle.”
Pruvit Keto OS Side Effects – “You Betcha!”
The taste wasn’t the only problem that came up. We also found reports of Keto OS side effects. If the product pushes the user into ketosis, some adverse reactions could be attributed to what’s often called “Atkins Flu.” As the body adjusts from burning carbohydrates to fats for fuel, fatigue, muscle aches and headaches are common.
“Muscle aches and vomiting within 30 minutes to one hour after each ingestion ensued. Was told to take with digestive enzymes. Still no difference. Felt worse after each consumption. Very disappointed,” explains one person who tried the Keto Os diet.
“Numerous times it made me sick to stomach, unproductive and a bit wired,  even without the caffeine version,” a customer reports.
Another user claims, “I took 1/2 a packet and 15 hours later I was still wired and jittery from it. My heart was racing.”
On the other hand, we found reviews of Keto OS mentioning positive side effects.
“It helps keep you in ketosis, without horrid side effects,” commented a customer.
“I drink half a pack on workout days and it gives me so much energy,” stated another.
Based on our research, it takes something that doesn’t seem important, like a few muscle aches, to cut down your chances of long-term success. There’s an issue if customers don’t have great things to say about Keto OS results or Keto OS Max.
The Science – “Is It Legit?”
Here’s where things get interesting with the Keto OS diet. There are 110 calories in each serving. But, when you combine the fat, carbohydrates and protein, it only adds up to 75. Where do the rest come from? Another problem is the fact that none of the ingredients have anything to do with ketosis.  You also have to consider the fact that there are 970mg of sodium, which is considered quite high.  That’s nearly 50% of your recommended daily intake. Here at DietSpotlight, we believe science is critical, but we couldn’t find any to back claims of Keto OS results at this time. Also: read our Dietspotlight Burn Weight-Loss Kit review »
The Bottom Line – Does Pruvit Keto OS Work?
Are we mixing our Keto OS powder into a glass of juice right now? Well, we like that it contains caffeine, but we’re concerned about no research backing the claims. You have to consider the fact that no supplement can kick you right into ketosis and the price is outrageous at $85 for two weeks.
Is a kick in metabolism what you’re looking for? We suggest trying out a product that comes with scientifically tested ingredients that work to help you lose weight without any risk of harsh side effects. The price needs to reflect the formula and not break the bank.
Among the best products we’ve seen this year is one called Dietspotlight Burn. After researching and studying ingredients, we chose one with four with clinical support. They’ve been shown to help improve metabolism, fight appetite and boost fat loss. There are users all over the web revealing amazing transformations.
Also, the company backs the product 100%, so they’ve chosen to offer up a Special Trial Offer.
Keto OS is a ketone booster. The term "ketone" may be familiar if you've ever followed or researched a low-carb diet. When the body burns fat for fuel in place of carbohydrates that's called ketosis. There are three versions - 2.1 Charged, 2.1 Caffeine Free and 3.0 Charged.
Pruvit Keto OS Ingredients and Supplement Facts
Serving Per Container: 30
|Amount per Serving||% DV|
|- Beta Hydroxybutyrate||*||*|
|- MCT Powder||*||*|
|2.1 Caffeine Free||*||*|
|- Beta Hydroxybutyrate||*||*|
|- MCT Powder||*||*|
|- Beta Hydroxybutyrate||*||*|
|- Amino Acid Blend||*||*|
Other Ingredients: Natural flavors, potassium citrate, ascorbic acid, butyrate, malic acid, stevia
- 1. Weight-loss diet that includes consumption of medium-chain triacylglycerol oil leads to a greater rate of weight and fat mass loss than does olive oil (2008). American Journal of Clinical Nutrition. October 12, 2016.
- 2. Does Caffeine Increase Your Metabolism? (2015). Livestrong. June 17, 2016.
Pruvit Keto OS Side Effects:
These days, weight-loss supplements are seemingly everywhere. This doesn’t mean that natural solutions are synonymous with being side effect free. With any formula, you are running the risk of an adverse reaction, as everyone is different. Keto OS side effects are rare, but that doesn’t mean they don’t occur with some users.
Muscle pain (myalgia) is fairly common and could occur in more than one muscle at a time. Muscle aches could also happen in the ligaments, bones, and tendons.  This pain is often related to tension or overuse of the muscle.
What causes muscle pain?
The most common of causes are muscle trauma or injury. Overuse of a muscle can be a factor as well as stress and diet. More serious issues may cause muscle aches as well, such as fibromyalgia, Lyme disease or lupus.
Vomiting is the act of ejecting the contents of the stomach out through the mouth and nose. Vomiting is often uncomfortable, however, individuals who vomit often feel better as nausea is relieved. This should not be confused with regurgitation, which is a different symptom altogether.
What causes vomiting?
Vomiting can be caused by a viral infection in the stomach or food poisoning.  Concussion and migraines can be a factor in vomiting, as well as inner ear disorders or infections.
Racing heart is the speeding of the heart beyond its normal rate. Fairly common after strenuous activity, if the issue occurs longer than that period it could mean a more serious medical condition.
What causes racing heart?
When the heart feels the need to work overtime to pump more oxygen-rich blood to areas of the body, it may increase in speed to keep up with demand. Numerous factors can cause increased heart rate including, caffeine intake, stress, anxiety, or low blood sugar.
Nausea is the uncomfortable feeling of queasiness in the upper abdomen with the inclination to vomit. Nausea (also known as qualm) is the body’s warning that vomiting could soon occur.
What causes nausea?
Nausea can be caused by some factors including inner ear disorders, medications, or food poisoning. Motion sickness and vertigo could cause nausea, with more serious factors being a brain tumor, heart attack, or carbon monoxide poisoning.
Keto OS side effects are relatively rare, but some users have reported nausea, vomiting, and racing heart, among some others. It’s always best to speak with a physician before taking any supplements, especially if you are under the age of 18, pregnant or nursing, taking prescription medications, or have a medical condition of any kind.
To state the obvious, every person responds differently when it comes to weight loss products. One that has been investigated, Dietspotlight Burn, has been clinically proven to accelerate weight loss, undue weight-loss plateaus and ignite the metabolism.
Pruvit Keto OS Questions & Answers:
We summed up dozens of user reviews and comments about Keto OS into this helpful FAQ.
What are the side effects of Keto OS?
Keto OS side effects mentioned in some user comments include a mild headache; but dieters admit not drinking enough water.
What is in Keto OS?
Keto OS ingredients are beta-hydroxybutyrate, ascorbic acid, caffeine, MCT powder, stevia, malic acid, and natural flavor.
What is the active ingredient in Keto OS?
The active ingredient is beta-hydroxybutyrate, which is a keto.
Who makes Keto?
Pruvit Ventures makes Keto OS.
Does Keto OS work?
Keto OS uses “ketone energy technology”  which assists with increasing energy, sparking metabolism, promoting cellular regeneration and longevity. It contains beta-hydroxybutyrate and MCT powder. Beta-hydroxybutyrate is a ketone used by the body as an alternative energy source. MCT or medium-chain triglycerides is a fatty acid promoting appetite suppression and weight-loss. The caffeine may provide a mild energy boost. 
How does a bottle of Keto cost?
According to the official website, the cost of Keto OS is $85 for 15 servings.
How do you take Keto OS?
You’ll take Keto OS by dissolving one packet in 12-16 ounces of cold water. A “therapeutic dose” is one serving per day. An “optimal performance” dose is two servings (one in AM and PM). It is recommended to take this product 30 minutes before a workout. You can also take with a low-carb meal.
How do I contact Pruvit Ventures, Inc. customer service?
You can get in touch with Pruvit Ventures customer service by emailing email@example.com. Other options are available on the official website.
Can I contact Keto OS through social media?
Can I take Keto OS if I have a health condition?
Women who are pregnant or nursing, those with health conditions, people taking prescription medications or under 18 years of age should contact a licensed physician before using any dietary supplement.
What do users like about Keto?
Some people like that Keto OS promotes weight-loss.
What do users not like about Keto OS?
Some users reducing salt intake didn’t like the amount of sodium in Keto OS.
Is there a Keto OS formula available without caffeine?
Yes, there is a caffeine-free version (orange flavor) of Keto available.
Is there a money-back guarantee for Keto OS?
Yes, there is a 90-day money-back guarantee provided on the official website for Keto OS.
Is Keto OS sugar-free?
No, each serving of Keto OS contains two grams of sugar, which comes from the stevia plant.
Are there deals or discounts with Keto OS?
Yes, there are deals and discounts with Keto OS. If you join Pruvit as a promoter, you’ll receive a discount. Another product we’re keeping our eye on is one called Dietspotlight Burn. Want to learn more, click above.
- 1. Insulin, ketone bodies, and mitochondrial energy transduction. (1995). FASEB J. October 8, 2016.
- 2. Body weight loss and weight maintenance in relation to habitual caffeine intake and green tea supplementation. (2005). Obesity Research. March 19, 2016.
Pruvit Keto OS Scientific Abstracts:
There was a significant effect of time on fasting serum glucose concentrations (P = 0.0177), and total cholesterol concentrations (P = 0.0386), as well as diastolic blood pressure (P = 0.0413), with decreases in these variables happening over time. Two of the three participants who showed signs of metabolic syndrome at baseline did not show evidence of metabolic syndrome at the endpoint. Results and data analysis suggest MTC oil may be included in a weight-loss program with no issues of negatively affecting metabolic risk factors. There should be distinctions made in regards to chain length whenever the effects of saturated fats on metabolic risk factors come into the discussion. 
In this study, participants lost 5.9 +/-1.8 (SD) kg (7.0 +/- 2.1%) body weight (p < 0.001). At the start satiety was good, leptin levels were related to the participant’s caffeine consumption (p < 0.01). Those who had high amounts of caffeine consumption found their weight, fat mass, and waist circumference to be reduced more so than those who consumed less caffeine. In low caffeine consumption users, during WM, green tea still decreased weight, respiratory quotient, body fat, and waist, whereas resting energy use was increased in comparison to the placebo group (p < 0.01). During weight management, no effects of the green tea and caffeine mixture were observed in high caffeine participants. Those who consumed high quantities of caffeine had experienced weight-loss through fat oxidation and thermogenesis and with suppressed leptin in women. 
Age-adjusted models of the trial had displayed a lower mean weight gain in the subjects who had raised their caffeine intake than in the participants who reduced their intake. The differences were insignificant: −0.43 kg (95% CI: −0.17, −0.69) in men and −0.41 kg (95% CI: −0.20, −0.62) in women. When coffee and tea consumption increased, there was notably less weight gain in the participants. In conclusion, higher amounts of caffeine intake may reduce long-term weight gain. 
Both groups in the study had lost around 5% of their body weight by the ninth week of trials (−5.3 ± 0.1 % versus −4.3 ± 0.4 %, p = 0.13), but the group who took inulin lost substantially more weight between nine and eighteen weeks (−2.3 ± 0.5 % versus −0.6 ± 0.4 %, p = 0.012). Participants who ingested the inulin had decreased hepatic (p = 0.02) and soleus muscle (p < 0.05) fat content at eighteen weeks. Fasting glucose greatly reduced at the ninth week only (p = 0.005), while insulin concentrations had not altered. There was a substantial rise in GLP-1 in the cellulose participants at nine and eighteen weeks (p < 0.03, p < 0.00001). Inulin may contain a two-pronged effect of risk for diabetes by promoting weight-loss, reducing intramyocellular and intrahepatocellular lipid in those who had pre-diabetes independent of weight loss. 
- 1. Medium Chain Triglyceride Oil Consumption as Part of a Weight Loss Diet Does Not Lead to an Adverse Metabolic Profile When Compared to Olive Oil (2008). The Journal of the American College of Nutrition. October 20, 2016.
- 2. Body weight loss and weight maintenance in relation to habitual caffeine intake and green tea supplementation (2005). Obesity Research. October 20, 2016.
- 3. Changes in caffeine intake and long-term weight change in men and women (2006). The American Journal of Clinical Nutriti. October 20, 2016.
- 4. A randomized controlled trial: the effect of inulin on weight management and ectopic fat in subjects with prediabetes (2015). Nutrition & Metabolism. October 20, 2016.