The fetus is creating millions of new cells daily. Those new cells will not develop normally unless the mother eats the right foods every day. Likewise, people with cancer, especially those undergoing treatment, require adequate nutrition and calories. Researchers have found that people who eat well during treatment are better able to withstand the side effects of treatment. They may even be able to withstand a higher dose of some treatments.
Good nutrition gives energy.
Just as an automobile is powered by fuel, we are powered by proper diet. Going through treatment requires extra strength. A balanced diet prevents body tissues from breaking down and helps rebuild normal tissue affected by treatment. People with cancer who practice good eating habits have fewer infections and are able to be up and about more. Inadequate diet forces the body to use stored-up protein and fat for energy.