Excessive sebum production results in oily skin. The overfunctioning of our sebaceous glands can have a genetic or hormonal background. These glands are present all over our body except for our palms and soles. They are mostly concentrated on our face (within that the T-zone is the most active area), chest and back, which is why blackheads and pimples appear more often in these areas. The pores of our skin, which are rich in sebum, are much wider and can become clogged and inflamed more easily. In addition, oily skin is often accompanied by dehydration. Choose a lightweight moisturizer for this purpose! Several active ingredients are especially good for treating oily skin. These include green tea, niacinamide, vitamin C, BHA, retinoids, certain algae, zinc, antioxidants.