Omnitrition diet drops contain a hormone called human chorionic gonadotropin, which is not legal for over-the-counter sale as of 2015, notes WebMD. The HCG hormone is produced naturally in the body during pregnancy and is sometimes prescribed to treat fertility issues, according to Mayo Clinic.
Omnitrition diet drops are marketed as a weight-loss aid. The drops are composed of purified water and HCG hormone, according to Diets in Review. HCG has not been approved by the FDA for weight-loss applications, and research suggests that the hormone does not have any weight-reducing properties, according to WebMD. These drops are often recommended in conjunction with a calorie-restricted diet. The diet may cause a host of side effects such as constipation, headaches, dizziness and leg cramps, notes HCGDietDrops.com.