It is best to see a doctor to determine whether your growth plates have already fused, as height is primarily determined by genetics and usually stops increasing after puberty. If you are an adult, it is unlikely that you can grow taller. There are no safe or effective medicines to increase height in healthy adults, so you should avoid any unregulated supplements claiming to do so.

Height mainly depends on genetics and growth plates in the bones, which usually stop growing after the late teenage years. Maintaining a balanced diet, regular exercise, good posture, and adequate sleep may support healthy growth during the growing years. After growth plates close, natural height increase is usually not possible. Consult a doctor about your growth and overall health.