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2.2 Chemicals and reagents Puerariae Lobatae Radix (Gegen, #210501), Scutellariae Radix (Huangqin, #220501), Coptidis Rhizoma (Huanglian, #220301), and Glycyrrhizae Praeparata cum Melle Radix et Rhizoma (Zhigancao, #211101) were purchased from Shizhen Pharmaceutical (Guangdong)

GHK-Cu may actually provide ongoing benefits with consistent use

Mechanisms by which dietary fatty acids regulate mitochondrial structure-function in health and disease

doi: 10.3389/fnins.2021.587197 Received 25 July 2020 Accepted 10 February 2021 Published 16 March 2021 Volume 15 - 2021 Edited by Anwen Shao, Zhejiang University, China Reviewed by Yi Yang, First Affiliated Hospital of Jilin University, China

Some sources report stability for up to 56 days, but 28 days is a safe guideline

(iii) Patient safety exception