Garlic has many medicinal values in it. Garlic contains phytochemicals. It halts the formation of nitrosamines, carcinogens in the stomach.
In the typical serving size of 1–3 cloves (3–9 g), garlic provides no significant nutritional value with the content of all essential nutrients below 10% of the Daily Value (DV) (right table). When expressed per 100 grams, garlic contains several nutrients in rich amounts (> 20% DV), including vitamins B6 and C, and the dietary minerals, manganese and phosphorus. Per 100 gram serving, garlic is also a good source (10–19% DV) of certain B vitamins including thiamine (Vitamin B1), and pantothenic acid (Vitamin B5), as well as certain dietary minerals including calcium, iron, and zinc (right table). It is very useful food in reducing cancer.