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The body typically uses glucose, or sugar as energy. When there is a lack of glucose, the body burnsfat for this purpose instead. In this case, acids called ketones may begin to build up in the blood. The body can also use ketones for energy, but they may leave the body via urine. The presence of ketones in the blood and urine indicates that a person has entered ketosis. Some people enter ketosis because they wish to lose body fat. In ketosis, the body breaks down its fat stores instead of relying on carbohydrates such as glucose for energy. As a 2021 review points out, ketosis may also have this effect because it suppresses appetite. Reaching ketosis can be challenging. Below, we explore seven ways to speed up this process. We also look at the risks involved and who may not benefit. 7 tips for reaching ketosis faster Strategies for encouraging the body to enter ketosis include: 1 Significantly reducing the carbohydrate intake Ketosis occurs when a lack of carbohydrates forces the body to use fat, not glucose, as its primary energy source. A person looking to reach ketosis should reduce their carb consumption to 50 grams or less per day. However, the exact carb limit can vary from person to person. 2 Increasing physical activity The more energy a person uses during the day, the more fuel they need. Exercise helps reduce the body’s stores of a form of glucose called glycogen. Usually, eating carbs restores glycogen levels. But a person on a low-carb diet is not sufficiently replenishing their glycogen stores. This encourages the body to turn to fat as a source of fuel instead. The adjustment can take some time, and during this period, a person may experience fatigue. 3 Fasting for short periods Intermittent fasting (IF) can help a person reach a state of ketosis. In some controlled cases, a doctor may recommend fasting periods of 24–48 hours, but most people do not need to fast this long to reach ketosis. IF may also help manage obesity, diabetes, and cardiovascular disease, and it may also protect against certain cancers and neurological disorders. However, confirming these benefits and IF’s long-term safety and efficacy requires more research. Anyone interested in trying IF should speak with a doctor first, as it is not advisable for everyone. 4 Increasing healthful fat intake Most people aiming for ketosis replace lost carbohydrates with an increase in healthy fats. Some sources include:olive oilavocados and avocado oilflaxseed oilnuts and seedsfatty fish, such as salmon While some people on the ketogenic diet add any fats to a meal, it is typically advisable to limit saturated and trans fats, such as those from fried foods. 5 Testing ketone levels A test can check ketone levels in the:urinebreathblood Testing can help a person track their progress and make tactical adjustments to their diet. They may further limit foods that cause a spike in glucose levels, for example. Simple ketone tests, such as strips and monitors, are available to purchase online. 6 Checking protein intake A person following the keto diet typically eats more dietary fat than protein. While recommended amounts of protein vary, one standard recommendation is consuming about 1 gram (g) of protein for every pound (lb) of body weight each day. People who exercise heavily might need 1.5 g/lb. Some believe that a lower protein intake is necessary, although the evidence on this point is mixed. 7 Consuming more MCT oil Medium chain triglycerides (MCTs), which a person can purchase as oil, can aid in ketosis. Specifically, MCT oil may help a person reach ketosis even when they eat less fat and more protein and carbs than a keto diet typically contains. Safety Ketosis is a natural metabolic state that can occur if a person has a low carb or low calorie diet. A person may wish to reach ketosis for many reasons. Some more common reasons include weight loss, fat reduction, managing type 2 diabetes, and promoting heart health. However, ketosis is not safe for everyone. Remaining in a state of ketosis for prolonged periods can have adverse effects in some people. For example, people with type 1 diabetes should avoid being in ketosis because it increases the risk of developing ketoacidosis, a potentially life-threatening condition. Also, doctors do not recommend the ketogenic diet for people who take insulin or have liver failure, pancreatitis, or a past diagnosis of high cholesterol. Anyone considering the keto diet should check with a healthcare professional first. Summary Ketosis is a natural state for the body to be in from time to time. It involves the body burning its fat reserves, instead of glucose, for energy. Maintaining ketosis for short periods involves minimal risk for many people. Dietary changes, such as intermittent fasting, can help. However, people with certain health conditions, such as type 1 diabetes, should avoid ketosis. Also, people should note that very little research has investigated the long-term effects of ketogenic diets. People who follow these diets may experience fatigue and nutritional deficiencies. Before starting any new diet, speak with a healthcare professional. Last medically reviewed on March 30, 2022Nutrition / DietObesity / Weight Loss / FitnessSports Medicine / Fitness 8 sourcescollapsedMedical News Today has strict sourcing guidelines and draws only from peer-reviewed studies, academic research institutions, and medical journals and associations. We avoid using tertiary references. We link primary sources — including studies, scientific references, and statistics — within each article and also list them in the resources section at the bottom of our articles. You can learn more about how we ensure our content is accurate and current by reading our editorial policy.Batch, J. T., et al. (2020). Advantages and disadvantages of the ketogenic diet: A review article.https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7480775/Harvey, C. J. C., et al. (2018). The effect of medium chain triglycerides on time to nutritional ketosis and symptoms of keto-induction in healthy adults: A randomised controlled clinical trial.https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5987302/Li, C., et al. (2019). Global surveillance of trans-fatty acids.https://www.cdc.gov/pcd/issues/2019/19_0121.htmLichtash, C., et al. (2020). Therapeutic use of intermittent fasting and ketogenic diet as an alternative treatment for type 2 diabetes in a normal weight woman: A 14-month case study.https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7342268/Masood, W., et al. (2021). Ketogenic diet.https://www.ncbi.nlm.nih.gov/books/NBK499830/Murray, B., et al. (2018). Fundamentals of glycogen metabolism for coaches and athletes.https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6019055/Research on intermittent fasting shows health benefits. (2020).https://www.nia.nih.gov/news/research-intermittent-fasting-shows-health-benefitsRoekenes, J., et al. (2021). Ketogenic diets and appetite regulation.https://journals.lww.com/co-clinicalnutrition/Fulltext/2021/07000/Ketogenic_diets_and_appetite_regulation.14.aspxFEEDBACK:Medically reviewed by Grant Tinsley, Ph.D., CSCS,*D, CISSN, Nutrition — By Jenna Fletcher — Updated on March 30, 2022 Latest newsWhat sets 'SuperAgers' apart? Their unusually large neuronsOmega-3 may provide a brain boost for people in midlifeSeasonal affective disorder (SAD): How to beat it this fall and winterCDC: Monkeypox in the US 'unlikely to be eliminated in the near future'Why are more women prone to Alzheimer's? New clues arise Related CoverageHow to do the 5:2 dietMedically reviewed by Katherine Marengo LDN, R.D. The 5:2 diet is a popular intermittent fasting method. It involves eating regularly on 5 days and severely restricting calories on 2 days. 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