The primary reason for this is because of acidity. Acidity reacts with the metal (copper, tin and trace of zinc) and creates the greyness on the skin. Here are some of the reasons: 1. In Ayurvedic terms it can be that you are strongly constitutionally, or as a result of life's circumstances conditionally PITTA. This fiery quality tends to make the body/and or skin more prone to being more acidic. 2. It can and also be the result of DIET and/or an environment that has a lot of pollution in the air. 3. Products that you use on your body and complexion have residual chemicals in them. These an be in the pores and drawn out by the Kansa. This could be sunscreen, moisturizers, make-up etc. They might be excellent products but just not suited to your skin type, in which case the Kansa is giving you vital feedback. 4. The greying can affect you immediately or after a period of time. In terms of time factor, it can be that you're rubbing away on your face and after 5 minutes the greying begins to come out. You are drawing out toxins from deeper in the body/tissues. The greying effect is positive. You are eliminating toxins, decreasing your body's acidity, and bringing yourself to a higher level of balance and wellness. The greying will easily wipe off with our Oil Cleanser, your face cleanser of choice, mist or any facial oil.