Drinking vinegar daily can replenish protein and other nutrients while promoting appetite. Vinegar is a liquid containing acetic acid brewed from sorghum, rice, barley, millet, corn, etc. or low grade white wine. It is also useful to use glacial acetic acid with water and coloring material to formulate, without adding coloring material that becomes white vinegar. Vinegar contains protein, carbohydrate, vitamin B₁, vitamin B₂, pantothenic acid, niacin, calcium, iron, zinc, magnesium, selenium and other nutrients. Every 100 grams of vinegar (average value) contains 31 calories, of which 2.1 grams of protein, 4.9 grams of carbohydrates, 0.3 grams of fat, 262 milligrams of sodium, 351 milligrams of potassium, 17 milligrams of calcium. Moderate amount of vinegar, supplemental nutrition at the same time can be appetizing and unctuous. Vinegar, as a common condiment, can be consumed by most people. However, those who have more stomach acid secretion and those who have ulcers in gastrointestinal tract should not drink too much vinegar to avoid causing abdominal pain and aggravating the burden on stomach and intestines. Young children gastrointestinal tract is not yet fully developed, should not drink too much vinegar, so as not to damage the intestinal tract.