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.
1 Some marketers proclaim that apple cider vinegar is high in fiber and therefore aids in weight loss. ( 2 Fiber provides bulk but is indigestible by the body, so foods high in fiber provide a feeling of fullness for fewer calories.) A daily dose is also said to control or minimize the appetite.