What's in alcohol?
One of the most startling realities about alcohol is that it is classified as a Class 1 carcinogen by the International Agency for Research on Cancer (IARC). The same category that includes tobacco and asbestos, alcohol has been conclusively linked to several types of cancer. Studies have found it to be a direct cause of cancers such as those of the liver, breast, esophagus, and oral cavity.2,3
Here’s how alcohol’s carcinogenic properties work:
• Acetaldehyde is the Culprit: When the body metabolizes alcohol, it converts it into acetaldehyde, a toxic and carcinogenic substance. Acetaldehyde damages DNA and prevents cells from repairing themselves, creating a pathway for cancer to develop.
• Inflammation and Oxidative Stress: Alcohol-induced inflammation can cause long-term harm to several systems, particularly in the liver, leading to conditions like cirrhosis and liver cancer.
• Hormonal Disruption: Alcohol consumption increases levels of estrogen and disrupts testosterone production, which is linked to higher risks of hormone-sensitive cancers, such as breast cancer.
Despite this classification and mounting scientific evidence, awareness around alcohol’s carcinogenic risk remains low. Much like the tobacco industry’s historic denial of health risks, the alcohol industry has not made these dangers clear to the public.