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Some are involved in growth hormone signaling

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For hair growth, the relevant signaling pathways are: vascular stimulation (more blood flow to the dermal papilla), follicle repair (extending the anagen growth phase), inflammation modulation (calming the chronic low-grade inflammation that contributes to follicular miniaturization), and systemic growth signaling (IGF-1 levels that influence overall regenerative capacity)

Enhanced endosomal signaling and desensitization of GLP-1R vs GIPR in pancreatic beta cells

Therefore, its natural biology is closely tied to gut physiology