I don’t know about "snake oil". but I do know that essential oils are very effective for stimulating new hair growth and keeping hair healthy. Essential oil scalp massage can help all types of female hair loss, as long as the follicle is still alive and undamaged, With hereditary hair loss, the follicle begins to shrink slowly and gradually. It takes many years for the follicle to stop producing hair. Essential oils help keep the follicle alive and energized, supplying nourishment through increased local blood circulation. They have a vasodilating effect that helps keep the follicle from shrinking. They also have the ability to dissolve excess sebum and cleanse the scalp of any pollutants. This cleansing action helps minimize the effects of dht. A healthy anti-inflammatory diet, nutritional supplementation and regular exercise can also help inhibit hereditary hair loss in those who are predisposed. See source below for more information.

that is a scam the snake oil