How to dilute essential oils safely

Essential oils are concentrated plant extracts — a single drop of peppermint holds the oil of a whole handful of leaves. On skin they need a carrier.

The 2% rule

For adults, add two to three drops of essential oil to one teaspoon (5 ml) of carrier oil such as fractionated coconut or sweet almond.

Face and sensitive skin

Halve it: one drop per teaspoon.