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Researchers should avoid stacking compounds with overlapping toxicity profiles or contradictory mechanisms
Ultrathin sections (80 nm thick) were cut with an ultramicrotome (Leica, EMUC6, Germany), and then stained with uranyl acetate and lead citrate and finally examined by a Tecnai G 2 Spirit TWIN transmission electron microscope (FEI, Hillsboro, OR, USA)
Nearly 40 years ago, it was discovered that the rat brain contained glucagon receptors, indicating that the hormone may play a part in controlling brain activity [33]
FIGURE 6 The aforementioned results suggested that the GHK-derived peptides exerted their anti-oxidative, anti-aging, and wound-healing activities in skin cells