L'Oréal Research and Innovation, Clichy, France.
L'Oréal Research and Innovation, Rio de Janeiro, Brazil.
J Eur Acad Dermatol Venereol. 2023 Oct;37(10):2090-2097. doi: 10.1111/jdv.19230. Epub 2023 Jun 9.
Data reflecting the impact of photoprotection on cutaneous aging are scarce and mostly limited to fair skin.
To assess the effectiveness of a photoprotective product in counteracting the photoaging process in different skin phototypes over 1 year compared against a classical routine.
Two hundred and ninety Brazilian women aged 30-65 years, with skin phototype II-VI were equally randomized in two groups. Group 1 kept on their routine whereas Group 2 applied, twice daily, a photoprotective product (SPF 60, PPD = 24.1) replacing the one they routinely used. Volunteers reported the duration of their daily sun-exposure. Standardized photographs taken at D and D were analysed by 15 dermatologists to assess eight wrinkles and pigmentation signs.
A global increase in severity was reported which was significant for Group 1. This increase was lower in Group 2 where only half the signs showed significant worsening. In Group 2 versus Group 1, the increase in forehead wrinkles, marionette lines, wrinkles created by ptosis and size of dark spot was significantly (p < 0.05) decreased by 30%-50%.
Daily application of a high photoprotective product significantly decreases the progression of skin aging signs after 1 year in skin phototypes II-VI.
反映光防护对皮肤衰老影响的数据稀缺，且大多仅限于白皙皮肤。
评估与传统常规相比，在 1 年时间内，一种光防护产品在不同皮肤类型中对光老化过程的影响。
290 名年龄在 30-65 岁之间、皮肤类型为 II-VI 的巴西女性被平均分为两组。第 1 组继续使用常规护肤产品，第 2 组每天使用两次光防护产品（SPF60，PPD=24.1）代替其常规使用的产品。志愿者报告他们每天的日照时间。在 D 和 D 时拍摄的标准化照片由 15 名皮肤科医生进行分析，以评估 8 个皱纹和色素沉着标志。
报告称两组的严重程度都有所增加，第 1 组的增加更为显著。第 2 组的增加幅度较低，其中只有一半的迹象显示出明显恶化。与第 1 组相比，第 2 组的额部皱纹、木偶纹、下垂引起的皱纹和黑斑大小增加了 30%-50%。
在皮肤类型 II-VI 中，每天使用高防晒产品可显著减缓皮肤老化迹象在 1 年后的进展。
