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Methodology PubMed and Google Scholar were searched up to November 2025 using a combination of keywords and MeSH terms, including visible light, high-energy visible light, blue light, pigmentation, photoaging, photodermatoses, photoprotection, tinted sunscreen, iron oxides, broad-spectrum UV filters, organic UV filters, inorganic UV filters, and antioxidants

Chronic low-grade inflammation and the overproduction of reactive oxygen and nitrogen species interfere with vital neurobiological functions, including neurotransmitter regulation, mitochondrial activity, synaptic plasticity, and neurogenesis

Battula VL, Yan Y, Nguyen K, K-A D, Andreeff M

Peer-reviewed clinical trials in the T4 family (RGN-259 ophthalmic, RGN-352 cardiac) used full-length T4

Researchers have investigated GHK-CU for decades, making it one of the most recognized peptides within skin, cosmetic, and regenerative research

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