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.
The main reason this works is that apple cider vinegar, as acidic as it tastes, actually helps to alkalize your body (most of us are more acidic). A body thatâs more alkaline may be more effective at fighting off viruses that cause colds and the flu. So adding in a wee bit of the tart, tangy vinegar can help. If drinking apple cider vinegar straight up is too much for you (especially if your stomach is upset from the cold or flu) dilute it with a bit of warm water, or hot tea, and some maple syrup. You can also add it to salad dressings.