Improved quality of life with cancer. The diagnosis of cancer often comes as a sudden and unexpected shock to those affected and their families. Although advancements in therapy have allowed many cancer patients to live well for a long time, those affected often react with significant fear. The illness is additionally shocking due to the frequently burdensome and intensive treatment. The demand for gentle therapeutic approaches and the use of complementary treatment methods has increased significantly in recent years. Many patients wonder if and how they can contribute to coping with the disease or at least prevent the progression of cancer. In addition to regular physical activity, learning psychological coping techniques, and a needs-based diet, the controlled intake of vitamins and minerals can make an important contribution.