He started investigating the effect of other essential oils for healing and for their psychotherapeutic benefits. During world war II, the French army surgeon Dr. Jean Valnet used essential oils as antiseptics. Later, Madame Marguerite Maury elevated aromatherapy as a holistic therapy. She started prescribing essential oils as remedy for her patients. She is also credited with the modern use of essential oils in massage.
Aromatherapy works the best when it works on the mind and body simultaneously.