The Licenders lice treatment Non-Toxic Commitment: As society becomes more aware of the potential dangers of chemicals and pesticides, natural products are currently being developed by Licenders that will help eliminate and prevent head lice. Studies have shown that combinations of herbs safely eliminate lice. The Licenders’ products are formulated by a renowned US herbalist, Noreen Mulvanerty (Nurse Practitioner, RN, MSN, CS, and FNP), using herbs that have been used as a natural insecticide for centuries.