photoaging

DL-Mandelic acid (acidomandelico) 是一种 α-羟基羧酸，有抗菌活性，广泛用作医药和精细化学品的中间体，已用于研究尿路感染和阴道滴虫病，还具有较高的精子固定活性和较低的阴道刺激性。

Palmitoyl tetrapeptide-7 is a cosmeceutical peptide that stimulates type I collagen, fibronectin, and hyaluronic acid production in skin.1Formulations containing palmitoyl tetrapeptide-7 have been used in the treatment of photoaging, dark circles, and undereye puffiness. 1.Bucay, V.W., and Day, D.Adjunctive skin care of the brow and periorbital regionClin. Plast. Surg.40(1)225-236(2013)

H-Gly-Pro-Hyp-OH是一种有效和可口服的抗光老化胶原肽，能够减轻炎症，降低MMP-1和MMP-3含量；能够减轻H2O2诱导的真皮成纤维细胞老化；能够恢复皮质醇介导的I型胶原蛋白和GR激活的抑制和(TGF)-β信号等抑制；改善人体皮肤的水合性、弹性和抗皱性。

Dalbergin (6-Hydroxy-7-Methoxy-4-Phenylcoumarin) 是一种 Dalbergia Sissoo Linn. knot wood 提取物的成分。它具有强大的抗氧化活性。

Cycloheterophyllin has an antioxidant effect, it is a photoprotective agent that inhibits ultraviolet A (UVA)-induced oxidative stress and damage, and could be used in the research on and prevention of skin photoaging.