You don’t have time to take proper care of your hair. Yet there is a solution adding essential oils to your shampoo. Essential oils are concentrated plant extracts, which are said to contain the soul of a plant. Try Lemon or Lavender for smell. Experiment with mint for dandruff. Sage for gray hair. The Rule is 10 drops of oil for 10 ml of shampoo. So add 30 drops, around 2 Tablespoons for a large 300 ml bottle. Shake will before use, and enjoy the benefit.