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The World Health Organization (WHO) has stated that there is no completely safe level of alcohol consumption for health. This does not mean that every drink causes immediate harm, but rather that the risk of certain diseases—including several cancers—begins to increase from the first alcoholic drink and rises with greater consumption.
What the Latest Research Says About Alcohol
The Centers for Disease Control and Prevention (CDC) continues to define moderate drinking as up to two standard drinks per day for men and up to one standard drink per day for women. These are risk-reduction guidelines, not recommendations to begin drinking or a guarantee that these amounts are risk-free.
Alcohol is classified as a Group 1 carcinogen by the International Agency for Research on Cancer (IARC), meaning there is sufficient scientific evidence that it can cause cancer in humans. Research has linked alcohol consumption to at least seven types of cancer, including cancers of the breast, liver, colon and rectum, mouth, throat, larynx, and esophagus.
One of the biggest shifts in recent years concerns the long-held belief that red wine protects the heart. Newer studies—including Mendelian randomization research, which is less vulnerable to many of the biases seen in observational studies—have challenged the idea that alcohol itself provides meaningful cardiovascular benefits. Researchers now believe that many of the apparent benefits seen in older studies may have been influenced by differences in lifestyle, diet, socioeconomic status, and overall health.
This does not mean that everyone who drinks should stop immediately. Instead, experts emphasize that drinking less is generally associated with lower health risks. People who do not drink alcohol are not encouraged to start for potential heart-health benefits because the evidence does not support alcohol as a preventive therapy.
Certain groups should avoid alcohol entirely, including pregnant individuals, people taking medications that interact with alcohol, those with liver disease, individuals recovering from alcohol use disorder, and anyone planning to drive or operate machinery.
The bottom line is that the safest choice for long-term health is to drink little or no alcohol. If you do choose to drink, staying within the CDC's moderation guidelines can reduce—but not eliminate—health risks. The growing body of research suggests that healthy eating, regular exercise, quality sleep, and not smoking remain far more effective strategies for protecting cardiovascular health than drinking alcohol.
