Do fat burner capsules, creatine, amino acid supplementations and bodybuilding products cause cancer in the future?

Depends: It depends what the chemical ingredients of "Body Building" products are. Some could be be carcinogenic. More importantly none of these of these things are doing you any good, other than lightening your wallet. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex, if you have sex.