This system thoroughly repairs, purifies, rejuvenates, revitalizes, clarifies, protects and moisturizes leaving the skin healthy. Amazing skincare system for teenagers. Acne is a skin condition that affects almost all teenagers. The sebaceous glands make an oily substance called sebum, emptying onto the skin surface through the pores. The mixture of oil and cells allows bacteria that normally live on the skin to grow in the follicle openings. When this happens, pores become clogged and pimples develop, which in turn may leave dark spots.