They're easy to digest, high in protein, cheap, and you can make them a hundred different ways
Also, levoglucosan is typically the most abundant species in wood-burning aerosols, which substantially contributes (16.6 %30.9 % by mass) to the total organics in PM 2.5 (Mochida and Kawamura, 2004
Aug 7 2018;10(8)doi:10.3390/nu10081029
Copper is involved in skin and connective-tissue biology, and GHK-Cu is best known because it connects copper signalling with collagen, elastin, glycosaminoglycans, wound-response models, and tissue remodelling
Lind, N
This is typically done during an endoscopic ultrasound but can also be performed by inserting a needle through the skin and into the pancreas