Additives. After drinking five female doctors, I always want to sleep because of some additives. If you feel sleepy after taking it, it may be related to drinking this collagen peptide. Collagen peptide can release the hidden pressure in the body. If you are really sleepy, it is recommended that you stop drinking collagen and pay attention to a balanced diet. If you have such symptoms at ordinary times, you'd better check your blood pressure and blood routine. At the same time, we should appropriately increase some nutritional exercises and maintain good rest and sleep.