photoaging

It is an isomer of cresotinic acid (2-hydroxy-3-methylbenzoic acid) and oxymethylbenzoic acid (2-methoxybenzoic acid). Derivatives of mandelic acid are formed as a result of metabolism of adrenaline and noradrenaline by monoamine oxidase and catechol-o-methyl transferase. It is also present in certain skin care products, is an intermediate molecule in the production of other biochemicals, may be used as an analytical reagent and is a precursor in the manufacture of dyes. Mandelic acid (acidomandelico) is found to be associated with phenylketonuria, which is an inborn error of metabolism.

Porphyra 334 is a mycobacterial acid amino acid (MAA) discovered in P. yezoensis, exhibiting antioxidant and anti-photoaging effects. It inhibits ROS production and MMP expression following UVA irradiation, suppresses AAPH-induced oxidation, and prevents lipid peroxidation induced by singlet oxygen.

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 is a potent and orally available anti-photoaging collagen peptide that attenuates inflammation and reduces MMP-1 and MMP-3 levels; attenuates H2O2-induced aging of dermal fibroblasts; restores cortisol-mediated inhibition of type I collagen and GR activation and (TGF)-β signaling signaling, among other things; and improves the hydration of human skin, elasticity and anti-wrinkle properties.

1. Dalbergin (6-Hydroxy-7-Methoxy-4-Phenylcoumarin) exhibits similar bone conserving effect against bone-loss as estradiol treatment, it as a therapeutic candidate against postmenopausal osteoporosis. 2. Dalbergin prevents some effects of photoaging and maintain skin integrity by regulating the degradation of the extracellular matrix proteins.

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.