Apple cider vinegar, otherwise known as cider vinegar or ACV, is a type of vinegar made from cider or apple must and has a pale to medium amber colour. Even though vinegar is acidic, when we take apple cider vinegar it has an alkaline effect in our bodies. The fact that apple cider vinegar causes our pH levels to become more alkaline could play a large part in it's curative properties.
The only study to test the idea that ACV can assist weight loss in people was done in Japan. In the study, 175 obese but healthy people took either vinegar or water daily for 12 weeks. Their diets were similar. They kept food journals. At the end of the study, those who used vinegar had lost slightly more weight. On average, the vinegar group lost 1-2 pounds over the 3-month period. They gained it all back after the study was over. The researchers suggest that vinegar may turn on certain genes involved in breaking down fats.