Check the label of your moisturizer to ensure it has adequate amounts of key ingredients that protect against both ultraviolet A (UVA) and B (UVB) rays. A study was conducted looking at 29 best-selling daily facial creams. Researchers found that most creams—regardless of cost, popularity, or sun protection factor (SPF)—provided inadequate or no protection against photoaging from UVA radiation. Unfortunately, there is currently no standard measure of protection against UVA and the SPF of sunblock refers only to protection from UVB rays. Adequate protection against UVA must include one of the following: (1) combination of avobenzone (>two percent) and octocrylene (>3.6 percent) with or without ecamsule (two percent); or (2) zinc oxide (>five percent).