Collagen supplementation for skin health: A mechanistic systematic review.

Background: Over the last decade, many researchers tried to evaluate the effects of collagen supplements on skin aging and surprisingly revealed that the interventions improved skin aging parameters without any inconsistency.

Aim: This systematic review assesses the literature regarding the effects of collagen supplements on skin health parameters in healthy and patient subjects, focusing on mechanisms of action.

Methods: At the first step of search in the databases, 9057 items were obtained.