In Australia, almost 6,000 deaths a year can be attributed to alcohol, as well as around 400 hospitalisations a day. While drinking has declined in some segments of the population, with related stabilising of rates of death and illness, these numbers are far too high. Similar reports are emerging in other countries.
Many people remain unaware, blissfully or otherwise, of long-term risks, which aren’t just restricted to “heavy drinkers”. Alcohol is one of the largest risk factors for avoidable death and illness.
The growing list of alcohol-related diseases includes bowel cancers, mouth and oesophageal cancers, breast cancers, heart disease, respiratory infections and mental health problems. Some evidence is emerging of a link with other diseases such as prostate cancer.
We have also seen the transgenerational impact through fetal alcohol spectrum disorders (FASD). These are lifelong and severe disorders that occur as a result of exposure to alcohol in the womb.
Here are four diseases evidence shows are linked strongly with alcohol consumption.
In total, cancers account for the largest proportion (more than one-third, or around 2,000 Australian deaths a year) of alcohol-attributable deaths. Breast cancer is the leading cause of death for women, followed by liver disease. For men, the leading cause is liver disease, followed by bowel cancer.
Three decades ago, the World Health Organisation identified alcohol as a group one carcinogen, in the same category as tobacco. But many health professionals and others still don’t connect alcohol and cancer.
It has been estimated that alcohol is a leading cause of cancer worldwide, contributing to 770,000 cases.
Cancer risk can increase at relatively low levels of consumption, and rises the more you drink. It’s also influenced by individual vulnerability.
For bowel cancer, risk increases from two standard drinks a day. For every standard drink, breast cancer risk for women increases by around 12%. Cancers of the larynx (voice box) increase from one standard drink a day – daily consumption of ten standard drinks a day increases the risk four-fold compared to not drinking.
Similar evidence exists for mouth, oesophageal and liver cancers. Emerging evidence suggests we also need to consider associations with prostate, pancreatic, lung and gallbladder cancers and malignant melanoma.
2. Heart disease
There are strong claims about the benefits of low doses of alcohol.
But systematic reviews (where multiple studies are analysed) conclude that there is no net benefit, or very limited benefit, of moderate drinking over abstention. Even where protective effects for the heart are identified, these are often at very low levels of consumption (such as one standard drink every other day).