1. Allium

This compound has antimicrobial effects that can prevent cardio-vascular diseases and cancer. Garlic, which is one of the best sources, has the ability to kill H. pylori, bacteria associated with stomach cancer. Garlic may reduce the risk of colon, esophageal, pancreatic and breast cancers.

Peel, chop a clove of garlic and let it rest for 15 mins. Cook it or swallow with water. Other categories of this compound include chives, scallions, leeks, and onions.