The Effect of Peroral Sodium Hyaluronate on the Skin

Study type: * Single-center, randomized, placebo-controlled, double-blind, parallel-group study. * Participants will be stratified based on their sex (males/females) and age (young 18-39 years and old 40-60 years, max difference in median age between males and females 2 years), and randomly assigned to receive either the SH dietary supplements (lower concentration, daily dose 60 mg (SH60); and higher concentration, daily dose 120 mg (SH120)) or placebo in a 1:1:1 ratio. * The study will follow a superiority framework, aiming to demonstrate that the SH60 and SH120 dietary supplements are superior to placebo in improving facial skin hydration. * This study is a parallel-group trial: The three groups of participants (SH60/SH120/placebo group) will receive the treatments and will be assessed for their outcomes at the same time points.