Clarins Energy Booster is designed to target damaged skin, it revives radiance, tones and re-energises the skin. Skin can be effected by your personal lifestyle and environment such as late nights, jet lag and even dieting. This energy booster helps to quickly and easily relieve skin of the damaging effects. To use: Add 3-5 drops of booster to your face cream, mask, or foundation, blending until smooth before apply as usual. Do not use alone.