Water and excess oil are removed from the skin during cleansing. Normal amounts of water and oil are necessary to keep the skin moisturized, particularly for aging skin. Even if you have acne, you should moisturize to put oil and water back into the skin. Use a moisturizer that's oil-free and perfume-free so it won't aggravate acne-prone skin [source: AAD Guidelines].

Be sure to moisturize your body in addition to your face. The face has the most oil glands on the body, so apply a thin layer of moisturizer to the face; a thicker layer may be applied to other body parts [source: Skin Care Guide Types]. If you're worried that your moisturizer is contributing to your acne, see your dermatologist.

If you have acne and use cosmetics, choose makeup that's labeled as noncomedogenic or oil-free. Wear powder foundations instead of liquid foundations because liquid foundations may add oil to the skin. Put medications and other treatments on the skin before using moisturizer or makeup. If you find that a product irritates or causes more acne, discontinue its use.

Cleansing, moisturizing and using the appropriate cosmetics should be enough to prevent acne. Many of these products incorporate vitamins, which can help clear and prevent acne. Read on to learn about the vitamins you can incorporate into your daily acne care regimen.