If the chromic acid oxidation is performed with stoichiometric oxidant in the presence of diethyl ether as co-solvent (a method introduced by H.C. Brown), the epimerization of l-menthone to d-isomenthone is largely avoided.
Apple cider vinegar isn't likely to be effective for weight loss. Proponents of the apple cider vinegar diet claim that drinking a small amount of apple cider vinegar before meals or taking an apple cider vinegar supplement helps curb appetite and burn fat. However, there's little scientific support for these claims.
Often, people take apple cider vinegar pills in the hopes of losing weight. These pills are said to help a person feel full for a longer period of time, which means it can work as a natural appetite suppressant. If a person feels hungry less often, he may find it easier to consume fewer calories and lose weight.