As the most prominent protein in a human body, collagen underpins one’s fortitude, elasticity, hydration, and skin health. Both topical and ingestible collagen-based skin products have proliferated in recent years, offering diverse forms like creams and serums to powders, jellies, and emulsions. This article analyzes and evaluates the skincare methods of topical and ingestible collagens, suggesting that the skin barrier limits topical formulations, making ingestible collagen peptides more effective. After reviewing the mechanisms, available science, and outcomes, this article forges a conclusive argument for the optimal method of dermal collagen supplementation.

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