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Kevin Klatt, PhD, RD, an assistant research scientist and instructor in the Department of Nutrition Sciences and Toxicology at University of California, Berkeley, cautions that epidemiological studies using circulating levels of nutrients or metabolites as proxies for dietary exposure often dont correlate with randomized controlled trials that aim to increase levels of those nutrients or metabolites
Furthermore, determining the effective dose and therapeutic window, the lack of reliable biomarkers to confirm Nrf2 activation and predict response, and the need for better patient selection are also critical
Animal models: Nanoliposome-encapsulated GHK-Cu showed accelerated hair growth in C57BL/6 mice with visibly earlier anagen onset compared to free peptide controls (Tian et al., 2022)
(6) Cholinergic crisis: Excess dosing may result in severe muscle weakness and respiratory compromise, requiring urgent recognition and discontinuation of therapy
