Nutrient deficiencies despite a healthy diet? It has never been easier for us Europeans to eat a balanced and healthy diet. Yet studies show that many people suffer from micronutrient deficiencies. Vitamin B12 is particularly problematic for affected individuals, while children primarily lack folic acid and zinc. Young women often experience iron deficiency, and older adults have deficits in vitamin D3 and calcium. This book explains why this is the case and how a one-sided diet, as well as fast food, convenience meals, excessive meat consumption, sugary drinks, and denatured foods disrupt the nutrient balance. Additionally, there are triggers that one might not suspect, such as alcohol and nicotine, as well as many medications, the pill, or certain conditions like diabetes. Special life situations, such as pregnancy and stress, also play a significant role.