Skin fasting is the practice of reducing the amount of products and treatments you use on your face for a period of time. This might be as simple as removing your daily moisturiser from your routine, or dialling down on your entire skincare regimen. The idea is to fast the skin of treatments and ingredients and allow the skin to rest and ‘reset’. By allowing your skin to repair and rejuvenate on its own, some claim that the skin is able to moisturise and even exfoliate itself.