There, they look at the blood to check how much GLP-1 is in it
Salehi B, Mishra AP, Nigam M, Sener B, Kilic M, Sharifi-Rad M, Fokou PVT, Martins N, Sharifi-Rad J (2018) Resveratrol: a double-edged sword in health benefits
The most studied mechanisms include: upregulation of growth hormone receptors in fibroblasts (increasing sensitivity to healing signals), activation of the FAK-paxillin pathway (promoting cell adhesion and migration), modulation of the nitric oxide system through Src-Caveolin-1-eNOS phosphorylation (enhancing vascular function), and dual activation of the Egr-1/NAB2 gene loop (promoting organized, non-chaotic blood vessel growth)
A cross-over study of the acute effects of espresso coffee on glucose tolerance and insulin sensitivity in people with type 2 diabetes mellitus
Zhou X, Ji WJ, Zhu Y, He B, Li H, Huang TG, Li YM