Hangover is caused by the combination of toxic by-products after the metabolism of alcohol and its not a pleasant feeling! Added to this are dehydration and the depletion of Vitamins A, B (particularly B6) and C brought about by the chemical action of alcohol in your body. An old trick to prevent hangover is to take oily foods such as butter or olive oil before consuming alcoholic drinks and to drink water before going to bed to avoid dehydration. 21ST Century Hang Over Shake is a special powder which is formulated to prevent hangovers and increase alcohol metabolism in your body. 21ST Century Hang Over Shake dissolves and forms a lining over your stomach wall thereby preventing alcohol from being absorbed. It is a powdered drink mix containing vitamins, phospholipids and amino acids which are depleted by the alcohol metabolism process. It also contains the necessary nutrients to support the bodys alcohol processing mechanism. Mix 50 grams or 4 heaped tablespoons of Hang Over Shake powder in 250ml or a cup of warm water. Drink it warm, hot or chilled. Drink half to one hour before taking alcohol and again as soon as possible after alcohol consumption.