Juicing for health is a myth. Fruit juice disrupts blood sugar & insulin levels. Excess insulin leads to cardiovascular disease, metabolic syndrome & diabetes.
Juicing for weight loss is a defective strategy. Juicing reduces satiety & results in the release of excess insulin which is a potent fat storage hormone.
Drinking alcohol before meals affects how the meal is eaten. You eat past normal satiety levels & eat for a longer duration thus increasing calories eaten.