General name for various types of apples, all of which have potent antioxidant ability that, at least in theory, can benefit skin when applied topically. There is more research concerning the health benefits of eating apples rather than applying them topically via skincare products, but we know that apples have many valuable components that could benefit skin (Sources: Plant Physiology & Biochemistry, September 2014, pages 169-188; and Journal of Medicinal Food, November 2012, pages 1,024-1,031).
References for this information:
Plant Physiology & Biochemistry, September 2014, volume 82, pages 169-188
Journal of Medicinal Food, November 2012, issue 11, pages 1024-1031