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Does Drinking Alcohol Cause Cancer?

Posted by Christopher Picerni on
Does Drinking Alcohol Cause Cancer?

When we drink, usually the first thought of the damage it causes is the next morning. The dreaded hangover. But how many of us are thinking of the longer-term impacts once that hangover has worn off?

We may be aware of some of the longer-term harm that alcohol causes such as blotchy and discolored skin, liver damage, and cognitive defects, but unfortunately, we may overlook a scary potential impact. Cancer.

Yes, alcohol consumption has been linked to cancer. Let’s explore why.

Why Alcohol Can Cause Cancer

  1. The Toxic Byproduct of Alcohol

Central to this connection is ethanol, the main chemical in alcohol. Upon metabolization, ethanol creates acetaldehyde – a toxic substance that inflicts damage on our DNA and proteins. This cumulative damage becomes a contributing factor to the development of cancer cells over time.

In fact, acetaldehyde is so toxic, the International Agency for Research on Cancer considers it a Class 1 carcinogen.

  1. Inflammation and Oxidative Stress

Excessive alcohol consumption can trigger a chronic state of inflammation and oxidative stress within the body. These factors serve as pivotal players in the initiation and progression of cancer. In particular, persistent inflammation can create an environment conducive to the proliferation of cancer cells.

  1. Hormonal Disruption

For certain cancer types, such as breast and liver cancer, alcohol intake can disrupt hormone levels. Heightened levels of specific hormones are associated with an elevated risk of cancer development. Thus, consistent heavy drinking can lead to hormonal imbalances that augment the risk.

Types of Cancer and Potential Risks

Gaining insights into the types of cancer influenced by alcohol consumption is essential for making informed decisions regarding our drinking habits. Here's a glimpse of the primary cancer types linked to alcohol intake:

  1. Oral, Throat, and Esophageal Cancers

Regular consumption of alcohol amplifies the susceptibility to cancers in the oral cavity, throat, and esophagus. The direct interaction of alcohol with these tissues, coupled with its capability to generate acetaldehyde, elevates the risk.

  1. Breast Cancer

Among women, even moderate alcohol consumption correlates with an increased likelihood of breast cancer. Hormonal perturbations induced by alcohol, combined with its general influence on cancer vulnerability, contribute to this risk.

  1. Liver Cancer

Prolonged heavy drinking can lead to liver cirrhosis, significantly heightening the probability of liver cancer. The liver's role in metabolizing alcohol also exposes it to the harmful effects of ethanol and its derivatives.

  1. Colorectal Cancer

Evidence suggests that alcohol intake is associated with a heightened risk of colorectal cancer. Underlying mechanisms involve inflammation and oxidative stress in the digestive tract.

Moderation and Mitigation

In the midst of scientific complexities, moderation and proactive measures emerge as essential tools. Opting for moderate alcohol consumption can help mitigate some of the potential cancer risks. Moreover, awareness of personal risk factors, genetic predispositions, and family histories can serve as guiding stars for making mindful choices.


It is important to recognize that drinking is simply not good for us from a physical health perspective. This harm goes way beyond a rough next morning and can cause catastrophic damage. The links between drinking and cancer development have been well researched, so please be mindful and moderate when you drink.

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