Dr Proctor's Advanced Hair Formula by Dr. proctor. $33.95. Proven results for over 20 years. Made in USA by Dr. proctor. Stop hair loss and prevent thinning hair. Safe with no side effects. Effective for both men and women. Dr. Proctor's Advanced Hair Formula is a multi-agent, natural formula designed to promote a healthy hair growing. Advanced Hair Formula is a liquid that is applied to the scalp.