If you have lung cancer, it’s common to notice less of an appetite or to lose weight without trying. The disease and its treatment can have an effect on your appetite and how your body breaks down food and uses nutrients.

Some people who have lung cancer take dietary supplements and vitamins to make sure their bodies get all the nutrients they need.

Certain supplements are safe and even helpful when you have lung cancer. Others may interfere with your treatment. Always ask your doctor before taking a dietary supplement or vitamin.