Homeopathic medicines are prepared from natural sources. Out of total homeopathic medicines 80% is from vegetable kingdom, parts used like roots, flowers, stems or juices. Rest 20% is divided between chemical, minerals like phosphorus, sulphur, potassium chloride, nitric acid etc, and animal sources like snake venom (Lachesis, Naja, vipera), bee sting (apis Mel).Also certain medicines are made from microbes, bacterias, viruses called Influenzinum, Tubercullinum, Pyroginum, this are called nosodes. Certain hormones and body secretions are used like thyroid, pituitary, this are called sarcodes.Homeopathy has plenty of sources of medicines and vides range of medicines so they are never ever adulterated with any other substances to prove its action. Whatever chemical substance present they are present as naturally.