But there is not enough evidence to claim that a particular diet can reliably prevent lung cancer.
The NCI specifically notes that the effect of diet and physical activity on lung cancer prevention remains unclear.
High-dose beta-carotene supplements have actually been associated with an increased risk of lung cancer in heavy smokers.
Large clinical trials found that pharmacological doses of beta-carotene increased lung cancer incidence and mortality in high-intensity smokers.
It is not accurate to present alcohol reduction as a specific, proven way to prevent lung cancer.
The internet has made cancer prevention sound like a shopping list. One week, a particular vegetable is described as protective. The next week, a vitamin or antioxidant capsule is promoted as a shield against cancer. The science is far less dramatic.
Eating a varied diet containing vegetables, fruits, whole grains, pulses and other nutrient-rich foods is good for overall health. But there is not enough evidence to claim that a particular diet can reliably prevent lung cancer. The NCI specifically notes that the effect of diet and physical activity on lung cancer prevention remains unclear.
There is also an important warning hidden inside the supplement conversation.
High-dose beta-carotene supplements have actually been associated with an increased risk of lung cancer in heavy smokers. Large clinical trials found that pharmacological doses of beta-carotene increased lung cancer incidence and mortality in high-intensity smokers.
So a colourful plate is a sensible choice. A handful of mega-dose antioxidant pills is not a substitute for it.
Alcohol also needs a more careful explanation. Alcohol is an established risk factor for several cancers, including cancers of the mouth, throat, oesophagus, liver, breast and colorectum. It is not accurate to present alcohol reduction as a specific, proven way to prevent lung cancer. Still, reducing alcohol intake lowers overall cancer risk, and avoiding heavy drinking is a sensible part of a broader cancer-prevention strategy.
In other words, food can support health without being sold as medicine.
