News Biology 27 November 2017 4 minute read Share Toggle Dropdown Save to Pocket Email link Print article Facebook Twitter Reddit Email link Print article Is apple cider vinegar really a wonder food? Will apple cider vinegar really help you lose weight, fight heart disease, control blood sugar and prevent cancer? Share Tweet It makes a tasty dressing, but the health claims are overblown. Madeleine Steinbach/Shutterstock Folk medicine has favoured apple cider vinegar for centuries and many claims are made for its supposed benefits. Apple cider vinegar is made by chopping apples, covering them with water and leaving them at room temperature until the natural sugars ferment and form ethanol. Bacteria then convert this alcohol into acetic acid. Strands of a “mother” will form in the cider. These are strained out of many products but left in others, and are often the target of health claims. The “mother” can also be used to start the production of the next batch of cider. But will apple cider vinegar really help you lose weight, fight heart disease, control blood sugar and prevent cancer? And what about claims it is rich in enzymes and nutrients such as potassium? Read more: The long, strange history of dieting fads Weight loss The evidence that apple cider vinegar helps fight fat is weak. A short-term study in Japan added two daily drinks of 15 millilitres of apple cider vinegar mixed with 250 ml of water to the usual diet of overweight men and women. Their weight fell by about one kilogram over 12 weeks, but returned to usual levels within four weeks. According to a UK study, it may be that vinegar can suppress appetite. When offered a pleasant-tasting vinegar drink, one that was less palatable, or a non-vinegar drink with their breakfast, volunteers who downed both vinegar drinks felt slightly nauseated. Not surprisingly, this depressed their appetite, with the least palatable vinegar drink having the greatest effect. The ‘mother’ is strained from some cider vinegars and left in others. Mike Mozart, CC BY Others claim taking apple cider vinegar with meals will help digest proteins faster and therefore generate higher levels of growth hormone. This is claimed to break down more fat cells. Unfortunately, there’s no evidence to support such ideas. Claims that pectin – a type of viscous dietary fibre – in cider vinegar will help weight loss by making you feel full for longer ignores the fact that the pectin in apples is not found in apple cider vinegar. Heart disease Pectin is again credited for cider vinegar’s supposed benefits for heart disease, with claims it “attracts bad LDL cholesterol”. However, the Japanese study referred to for weight loss found no difference in LDL cholesterol with either a low or higher amount of cider vinegar over a 12-week period. Read more – Heart disease: what happens when the ticker wears and tears Others claim that cider vinegar works like a broom to clean toxic wastes out of the arteries. Sadly, there’s no evidence for that one either. Blood sugar and diabetes Several studies have reported on the effects cider vinegar can have on blood glucose levels. One small study of healthy volunteers found that adding vinegar to a meal reduced glucose and insulin levels – at least for 45 minutes – and increased satiety for up to two hours. Another small study of people with type 2 diabetes reported adding vinegar to a high carbohydrate meal reduced the subsequent rise in the blood glucose level. However, this effect was only apparent for a high glycaemic index carbohydrate, such as mashed potatoes. When the carbs came from a lower GI food such as wholegrain bread, the vinegar had no effect. Read more – Explainer: what is diabetes A word of warning for those with type 1 diabetes who also have damage to the vagus nerve (a common co-problem): when taking apple cider vinegar in water before a carb-rich meal, the delay in the stomach contents passing to the small intestine may alter the quantity of insulin so the usual daily injection may be inappropriate. Other diseases As for allergies, acne, arthritis, hiccups and leg cramps, there is no evidence that apple cider vinegar prevents or cures any of these conditions. Recommended Could eating enough dukkah defer diabetes? Biology Nor is there evidence from any studies that cider vinegar has benefits for preventing or curing cancer. Unproven cancer cures can waste valuable time in seeking reliable treatments. So is it worth taking? Some sites promoting unrefined cider vinegar claim it is a good source of potassium. We certainly need potassium to help regulate the balance of water and acidity in the blood. But with apple cider manufacturers declaring their products have just 11 milligrams per 15 ml serve (and a recommendation for two serves a day) it is a negligible source. The recommended dietary intake of potassium is 2,800 mg/day for women and 3,800 mg/day for men. Bananas have around 400 mg. An average banana has 400 mg of potassium. Scott Webb/Unsplash In Australia, products cannot claim to be a source of any nutrient unless a reasonable daily intake provides at least 10% of the recommended daily intake (RDI). A “good source” must have 25% of the RDI. There is also no evidence to support the idea that apple cider vinegar makes it easier to absorb calcium. On the good side, like all vinegars, it has virtually no kilojoules and, mixed with extra virgin olive oil, makes an excellent salad dressing.Finally, a word of warning: don’t drink apple cider vinegar “neat”. It can damage the throat and oesophagus. Even diluted, its acidity can damage tooth enamel. Rosemary Stanton, Nutritionist & Visiting Fellow, UNSW This article was originally published on The Conversation and is republished here with permission. Read the original article. Explore #diet #health #tonic Share to Send to Toggle Dropdown Facebook Twitter Reddit Email link Print article The Conversation is an independent, not-for-profit media outlet that uses content sourced from the academic and research community. Follow Popular Today More No human DNA found in Neanderthal genome News The science of spider paws Gallery Coming clean: the physics of doing the laundry News Kill gut bacteria to battle pancreatic cancer, researchers say News Latest Stories More Five weird quantum effects Features In the kingdom of the blind, diabetes helps News Ata girl! Six-inch human’s secrets revealed News Patricia Piccinini's language of flesh Features More from Cosmos Conversation More Wrinkles, liver spots, crows’ feet: what happens to our skin as we age? 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