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.
How to Use Apple Cider Vinegar (ACV) For Weight Loss. If you are not used to the taste and effects of apple cider vinegar, you might want to include it into your diet gradually. Start by adding 1 teaspoon of apple cider vinegar to a cup of water and drink it once a day. Then, increase the amount of vinegar per serving, and the frequency of drinking. According to research on ACV and weight loss, you should consume a daily amount of 2 tablespoons of vinegar mixed with a cup of water.