Hi Sir, Welcome to Health Care Magic I can certainly understand your concern about swallowing of semen . it is probably not harmful to swallow your semen provided if you are very healthy and not suffering with any sexually transmitted diseases or any other infections. some studies say that it is instead good to swallow your semen because of its antidepressant properties. it mainly contains of water, proteins, aminoacids, sugars like fructose , glucose , vitamin c and minerals such as zinc and calcium. overall, there is nothing to worry unless and until you are suffering witha any major problem Post your further questions if any, I will available to take up your follow up questions Thank you