A short search gave me this answer: It makes sense to take creatine from the age of 18, especially for athletes who want to perform quickly or build muscle mass, according to the MEDICON pharmacy, AOK, protealpes and Planet Muscle Shop. Older people can also benefit from it to maintain the muscles. People with kidney problems should refrain from taking it and a medical consultation is recommended in advance. For whom does the intake make sense? Strength athletes and bodybuilders: Creatine can improve muscle building and performance during short-term, intense loads. Sprinter and HIIT fans: It supports the fast power and can help with high-intensity intervals. Team athlete: With many short, intense loads, it can be advantageous. Elderly people: It can help to maintain muscles and general mobility. Vegetarians and vegans: People who take less creatine through food can benefit from an additional intake. Important information Minimum age: Creatine is only allowed from 18 years. Health restrictions: If you have kidney problems, you should not take creatine, as it could be an additional burden on the kidneys. It is advisable to consult a doctor beforehand. Intake: A daily dose of about 3 grams is considered effective. The intake can take place at any time, for example after getting up or after training, whereby the intake after getting up and training may be slightly better due to the more willing intake of the cells. Combination: The combination with carbohydrates such as in fruit juice can improve absorption, as the resulting increase in insulin can promote absorption in muscle cells