Does Collagen actually make a difference, or is it overhyped?

Multiple independent meta-analyses of randomized trials find oral hydrolyzed collagen supplementation improves skin hydration and elasticity and reduces signs of skin aging, a reasonably consistent finding across several independent research groups. Weighing the data: Collagen looks an early-stage, lower-priority area for now — the evidence is only moderate (50/100), and its estimated impact (32/100) is on the lower end too.