These vitamins strengthen the immune system. Eat a balanced diet with fruit and vegetables, high-quality iron and healthy fats.
Exercise regularly and get enough sleep. Avoid alcohol and cigarettes, avoid stress and smoke cigars. Find out here what you should definitely pay attention to! Note to our readers : We create product comparisons and deals for you. To make this possible, we receive a commission from partners. This doesn't change anything for you; you can still buy what you want.