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Combining peptides with complementary dark circle treatments Vitamin C serums provide synergistic brightening through tyrosinase inhibition reducing melanin synthesis, antioxidant protection preventing ongoing pigmentation from UV and oxidative stress, and collagen synthesis support enhancing peptide-induced improvements through complementary pathway

Acknowledgements This research was funded by the National Key Research and Development Program of China (2021YFC2301500

In 2024, around 46% of specialty chemical companies adopted automated purification technologies improving high-purity guaiacol processing efficiency and product consistency

Unlike medications that compete for absorption or liver metabolism, collagen is broken down into amino acids (primarily glycine, proline, and hydroxyproline) during digestion and used for connective tissue repair