Multiple clinical studies have examined the effects of oral hyaluronic acid supplementation on skin.
Research published in peer-reviewed journals suggests that daily HA intake may support skin moisture content, elasticity and barrier function. In a 12-week, double-blind, placebo-controlled trial published in Nutrients, participants taking oral HA showed significantly higher stratum corneum water content and significantly lower transepidermal water loss than the placebo group, along with improvements in elasticity and wrinkle assessment.
Separate research has shown that oral HA is absorbed through the intestine and distributed via the bloodstream to skin tissue — the mechanism topical products cannot replicate, because the molecules are too large to penetrate the stratum corneum. While individual results may vary, the growing body of research indicates that oral hyaluronic acid supplementation may offer a convenient way to support skin hydration as part of a comprehensive wellness routine.