L'Oreal Paris Age Perfect Cell Renewal Day Cream Broad Spectrum SPF 15 Sunscreen, As skin ages, cell renewal decreases dramatically, so skin looks dry and dull. Age Perfect Cell Renewal Day Cream SPF 15 speeds surface skin cell renewal, revealing millions of new skin cells each day for fresher, more youthful looking skin. Instantly, skin feels smoother, more supple. In 1 month, skin appears renewed, vibrant and full of life.*based on skin surface cell turnover.