This oil based serum is effective in addressing a multitude of concerns. Fine lines, hyper-pigmentation,acne,eczema, and dark spots. The Japanese, time released, stabilized Vitamin C efficiently increases collagen growth, helping you to achieve a more even and youthful complexion. HOW TO USE: After cleansing apply the HPS to the entire face carefully avoiding the eye area. We recommend you use this product alone and in the evenings for greater results.