Thank you for your query. However, i would like to mention that though the concept is widespread in society, medical research has failed to find any link between semen loss and ill health/ weakness. Semen is produced continuously in the testis, stored for some time, and eliminated, either voluntarily (as in sex, masturbation) or involuntarily (popularly known as nightfall). this is a natural process. However, if you feel weak, or lack energy, you can get yourself looked at by a physician nearby for any underlying illness. I would also like to tell you that most patients whom i see for these complaints, however, don t have any real illness and tend to feel much better with a balanced healthy diet of protein (meat, eggs, milk, pulses), carbohydrates (glucose, potato, rice), fat (vegetable oils, butter), vitamins (green vegetables, fresh fruits) and minerals (iron, zinc, iodine etc) along with exercising and trying to follow a healthy lifestyle.