# Do keto or ketone supplements work? Source: https://www.healthnews24.co.za/answers/do-keto-supplements-work/ Publisher: Healthnews24 (South Africa's supplement answer desk) Updated: 2026-10-27 > Ketone supplements raise blood ketones for a short time, but there is no strong evidence that they burn body fat or make a keto diet work better. They add calories and are expensive. In South Africa, weigh them against the basics: calorie control, protein and training. People with diabetes should speak to a doctor before trying them. Key facts: - Exogenous ketones raise blood ketones within about an hour, but controlled evidence for fat loss in healthy people is lacking. - MCT oil supplies about 8 kcal per gram, roughly 115 kcal in one tablespoon (15 mL). - People with type 1 diabetes, or type 2 on SGLT2 inhibitors, risk ketoacidosis on keto diets and should get medical advice first. - Healthnews24 has not verified South African ketone product labels, so no prices are quoted. ## What are keto supplements? The term covers a few different products: - **Exogenous ketones** (beta-hydroxybutyrate or BHB salts, and ketone esters) raise ketones in the blood within about an hour of drinking them. - **MCT oil and MCT powders** are fats that the liver converts partly into ketones. - **"Keto burners" and "keto gummies"**, which are mostly marketing wrappers around caffeine, BHB salts or herbal extracts. ## Do they help you lose fat? Raising ketones with a supplement is not the same as burning your own body fat. When you drink BHB, your body has plenty of fuel, so it has no extra reason to release stored fat. Our assessment of the evidence is **limited to weak**: research on exogenous ketones is small, short and mostly about exercise performance, where results have been mixed. We found no strong controlled trials showing that ketone supplements cause meaningful fat loss in healthy people. Real weight loss on a ketogenic diet comes from eating fewer calories, often because appetite falls on a high-protein, low-carbohydrate diet. MCT oil supplies about 8 kcal per gram, so a 15 mL tablespoon is roughly 115 kcal, which is easy to forget when you are trying to lose weight. ## What do they cost and contain? We have not verified specific South African ketone products this round, so we do not list prices. When reading a label, check how much BHB (or MCT) is in a serving, which minerals it is bound to (sodium, calcium, magnesium or potassium) and how much total sodium or caffeine you are getting. Under South African law a label may not claim to treat or cure disease, and weight-loss claims need to be substantiated (R146, Consumer Protection Act s41; see [health claims explained](/answers/what-health-claims-are-allowed-on-supplements-south-africa/)). ## What are the risks? - **Digestive upset:** nausea, diarrhoea, cramps, especially with MCT oil or BHB salts. - **Mineral load:** BHB salts can deliver a large dose of sodium, potassium, calcium or magnesium. - **Diabetes:** ketone supplements and strict keto diets can be dangerous for people with type 1 diabetes and for people with type 2 diabetes who take certain tablets (such as SGLT2 inhibitors, which carry a risk of ketoacidosis). Speak to your doctor first. - **Kidney or liver disease, pregnancy and breastfeeding, under-18s:** do not self-prescribe. - **Sport:** multi-ingredient "keto" products with stimulants are the type SAIDS flags as higher risk for contamination ([drug-test safety](/answers/how-to-check-if-a-supplement-is-banned-for-sport-south-africa/)). ## What actually helps on a low-carb or keto diet? If you choose a low-carbohydrate diet, ketones come from the diet itself. Useful, cheaper supports are enough salt and fluid, adequate protein (about 1.6–2.0 g/kg) and fibre from vegetables. A whey isolate with minimal carbohydrate can help hit protein ([best whey isolate](/best/best-whey-isolate-south-africa/)). If you want to lose fat, calorie control and resistance training come first ([how much protein to lose fat](/answers/how-much-protein-to-lose-fat/)). ## Verdict Ketone supplements are a costly shortcut with little proof. They are not a replacement for a calorie deficit, and they carry real risks for some medical conditions. See also [do fat burners work](/answers/do-fat-burners-work-south-africa/). ## Sources - [ASC Food Safety Training: Food labelling regulations in South Africa, what R146 actually requires](https://ascfoodsafetytraining.com/food-labelling-regulations-south-africa-r146-complete-guide/) - [Consumer Protection Act 68 of 2008, section 41: false, misleading or deceptive representations](https://www.acts.co.za/consumer-protection/41_false_misleading_or_deceptive_representations) - [SAIDS: Supplements and their risks](https://drugfreesport.org.za/supplements-and-their-risks/) - [Jäger R et al. (2017) ISSN position stand: protein and exercise. JISSN](https://pubmed.ncbi.nlm.nih.gov/28642676/)