Based on the stability comparison, HPR is more stable than retinol

Can significantly increase the content of collagen type I ↑21%

Promote significantly up-regulation of Elastin rate ↑21%

Significantly reduced MMP-1 levels rate ↑30% in fibroblasts after UVB damage

Improve facial skin tone: Increase the facial skin color ITA° ↑9%

Improve facial skin elasticity: Increase the R5 value ↑26%