Grape Seeds are strong Anti-Carcinogenic and Anti-Tumor-promoting agent. Grape seed extracts may prevent the growth of breast, stomach, colon, prostate, and lung cancerous cells affected by dietary and/or metabolic acids in vitro.

Antioxidants, such as those found in grape seed extract, are thought to reduce the risk of developing cancers cells. Grape seed extract may also help prevent damage to human liver cells caused by chemotherapy medications.