Does a chronic hepatitis B or C infection increase your risk of liver cancer?
Yes, a chronic hepatitis B or C infection strongly and demonstrably causally increases your risk of liver cancer. Get tested and treated if you carry the virus, and ask your doctor about periodic surveillance.
Both chronic hepatitis B and hepatitis C infection substantially increase the risk of liver cancer. Hepatitis B raises that risk by a factor of 12.5, and hepatitis C by a factor of 11.2, compared with uninfected individuals. Together, these two viruses account for the vast majority of all liver cancer cases worldwide, with hepatitis B alone responsible for approximately 55 percent.
With hepatitis B, the amount of virus in the blood plays a major role. People with a very high viral load face a nearly 15 percent chance of developing liver cancer over a period of just over eleven years. At a low viral level, that figure is only 1.3 percent. This relationship holds regardless of other factors such as smoking, alcohol use, or liver cirrhosis. Hepatitis B is also distinctive in that it can integrate its genetic material directly into liver cells, meaning it can cause cancer even without cirrhosis. In hepatitis B with cirrhosis, the annual risk rises to 3.7 percent in Asians and 2.2 percent in Europeans.
Treatment helps, but does not fully resolve the problem. Antiviral therapy for hepatitis B with cirrhosis reduces the ten-year risk of liver cancer from just over 37 percent to around 23 percent, a reduction of nearly 60 percent. Nevertheless, the risk persists afterwards: regular surveillance for liver cancer remains necessary for everyone with hepatitis B and cirrhosis, even after successful treatment. For hepatitis C, modern antiviral agents now offer the prospect of substantial risk reduction, although the sources used contain less quantitative evidence for this.
The best protection against hepatitis-B-related liver cancer is vaccination. Taiwan demonstrated that a population-wide vaccination campaign genuinely reduced the number of liver cancer cases in young people. Those who are already infected and also have hepatitis C, or who have higher concentrations of the hepatitis B surface protein in their blood, face an even greater risk than with a single infection.
All claims are based on multiple PMIDs, including large cohort studies, meta-analyses, and guideline documents (PMID 39834076, 27742009, 21563647, 16391218, 32129773). The causal relationship between HBV and HCV and HCC is considered established in the literature.
Does a Helicobacter infection in your stomach increase your risk of stomach cancer?
An H. pylori infection demonstrably increases your risk of stomach cancer, but the risk for any individual remains limited. Get tested if you have not yet been treated, and discuss treatment with your doctor.
Does being overweight increase my risk of cancer, and if so, which types?
Excess weight increases your risk of at least 13 types of cancer, including uterine, colorectal, breast and liver cancer. Losing weight reduces that risk, although it remains unclear whether all methods of weight loss are equally effective for immune defence against cancer.
Does eating a lot of sugar increase my risk of cancer?
Drinking large amounts of sugar-sweetened beverages is associated with a noticeably higher risk of certain cancers, particularly early-onset colorectal cancer and liver cancer. The association is observational, but consistent enough to make reducing soft drinks and fruit juice a concrete point of attention.
Can long-term inflammation in your body cause cancer?
Prolonged inflammation is one of the most robustly supported risk factors for cancer. Well-known causes such as smoking, substantial obesity, and certain infections are modifiable, so addressing them concretely lowers your risk.
From how much alcohol do I actually face a higher risk of cancer?
Even with light drinking your risk of mouth, throat, oesophageal and breast cancer is already measurably higher. A safe lower limit does not exist.
Does alcohol increase your risk of cancer, even with one drink a day?
Yes, even one drink a day increases the risk of certain cancers, particularly breast and colorectal cancer. There is no safe lower threshold; drinking less or stopping reduces your risk immediately.