injectable l-carnitine side effects L-Carnitine: Benefits, effects, and dosage The bright and the dark

A lot of the evidence so far is in vitro (done on cells in a lab dish) or from small studies, rather than large, controlled trials on real skin over time

For instance, collagen peptides with DPP-IV inhibitory activity were derived from sheep skin by enzymatic hydrolysis (alcalase, neutrase, and flavorzyme), with alcalase collagen peptides showing the highest activity and potential protection from digestion, making them promising functional components for a diabetic diet [164]

Remember that the most important factor is bioavailability

Collagen Synthesis : Vitamin C is integral to collagen production, vital for skin and connective tissue health