Plameca Melanoctin (Melatonin) Drops 50ml is a natural medicine and phytotherapy product used to improve the immune system. These drops contain melatonin, a hormone produced by the pineal gland that regulates the sleep cycle and has antioxidant properties. Melatonin can also help strengthen the immune system and improve the quality of sleep. It is important to follow the instructions for use and consult a health professional before starting to use this product.