A single-center, double-blind, randomized, parallel-group, placebo-controlled study to evaluate the superiority of peroral sodium hyaluronate to placebo in improving the skin hydration and other skin-related parameters.
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.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Enrollment
150
Blood draw for testing of metabolics.
Testing of improving the skin hydration and other skin-related parameters.
Participants obtained altogether 3 flasks with 500ml of SH60, SH 120 solution. They tooj 15 ml of the SH60 or SH120 aupplements (experimental group) once daily in the morning before breakfast for 3 months.
Contipro a.s.
Ústí nad Orlicí, Czechia
Change in skin hydration
* Measurement site: forehead, volar forearm * Measurement time points: 0, 1, 2, 3 months * Measurement site: cheek * Measurement time points: 0, 1, 2 months * Measurement device: Corneometer CM 825 * Parameter unit: AU (arbitrary unit) * Number of measurements at each time point: at least 5 * Outcome measure: Change from baseline * Method of analysis: * Mean, standard deviation and confidence intervals will be calculated. * Normality of the data distribution will be assessed. * Comparison between HA group and placebo group will be assessed using independent sample T-test or Mann-Whitney U test as a nonparametric alternative.
Time frame: 0, 1, 2 , 3 months
Change in TEWL
* Measurement site: forehead, cheek * Measurement time points: 0 (baseline), 1, 2, 3 months * Measurement device: Tewameter TM 300 * Parameter unit: AU (arbitrary unit) * Number of measurements at each time point: at least 10 * Outcome measure: Change from baseline * Method of analysis: * Mean, standard deviation and confidence intervals will be calculated. * Normality of the data distribution will be assessed. * Comparison between HA group and placebo group will be assessed using independent sample T-test or Mann-Whitney U test as a nonparametric alternative.
Time frame: 0, 1, 2, 3 months
Change in skin elasticity
* Measurement site: forehead, cheek * Measurement time points: 0, 1, 2, 3 months * Measurement device: Cutometer MPA 580 * Parameter unit: AU (arbitrary unit) * Number of measurements at each time point: at least 1 * Outcome measure: Change from baseline * Method of analysis: * Mean, standard deviation and confidence intervals will be calculated. * Normality of the data distribution will be assessed. * Comparison between HA group and placebo group will be assessed using independent sample T-test or Mann-Whitney U test as a nonparametric alternative.
Time frame: 0, 1, 2, 3 months
Change in wrinkle depth
* Measurement site: crow´s feet area * Measurement time points: 0, 1, 2, 3 months * Measurement device: Primos Lite * Parameter unit: mm * Number of measurements at each time point: at least 3 * Outcome measure: Change from baseline * Method of analysis: * Mean, standard deviation and confidence intervals will be calculated. * Normality of the data distribution will be assessed. * Comparison between HA group and placebo group will be assessed using independent sample T-test or Mann-Whitney U test as a nonparametric alternative.
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Participants obtained altogether 3 flasks of placebo solution. They took 15 mL of placebo solution (control group) once daily in the morning before breakfast for 3 months.
Time frame: 0, 1, 2, 3 months