# Comparative effects of MKARE® eggshell membrane and hydrolyzed collagen as nutricosmetics on skin biophysical properties: a randomized clinical trial

**Authors:** Yaiza González-Rodríguez, Manuel A. La Nuez-García, Marina Jiménez, Vega Villar-Suárez, Alejandro Casado-Santos

PMC · DOI: 10.3389/fnut.2025.1689701 · Frontiers in Nutrition · 2026-01-14

## TL;DR

This study compares MKARE® eggshell membrane and hydrolyzed collagen as nutricosmetics, finding that MKARE® improves skin firmness and elasticity more effectively.

## Contribution

Demonstrates that MKARE® at 300 mg improves skin properties more than 8,000 mg hydrolyzed collagen.

## Key findings

- MKARE® significantly improved skin firmness and elasticity after 57 days.
- MKARE® outperformed hydrolyzed collagen and placebo in enhancing skin biophysical properties.
- Improvements are linked to enhanced collagen and elastin formation.

## Abstract

This study aimed to investigate the impact of fresh eggshell membrane (MKARE®) as a nutricosmetic ingredient, with a focus on its influence on skin properties. Biomechanical measurement devices were used to assess the effects on skin condition, and the results were compared with hydrolyzed collagen and a placebo.

Biophysical parameters were analyzed (using Cutometer®, Tewameter®, Corneometer®, and VISIA®) among participants showing signs of aging. These individuals consumed either 300 mg of fresh eggshell membrane (MKARE®) or 8,000 mg of hydrolyzed collagen, and the results were compared to a placebo group after 28 and 57 days.

The results showed significant improvements in skin firmness/flexibility and elasticity after 57 days of MKARE® intake, compared to both the hydrolyzed collagen and placebo groups.

This study demonstrates that a 300 mg intake of fresh membrane MKARE® positively affects mechanical skin parameters compared to the group that consumed 8,000 mg of hydrolyzed collagen or the placebo group. These improvements suggest that MKARE® consumption regenerates the skin structure, primarily due to positive changes in collagen and elastin formation, which are key contributors to the improvement of skin firmness, elasticity, and barrier protection.

## Linked entities

- **Proteins:** COL3A1 (collagen type III alpha 1 chain), LIMK1 (LIM domain kinase 1)

## Full-text entities

- **Genes:** ELN (elastin) [NCBI Gene 2006] {aka ADCL1, SVAS, WBS, WS}
- **Chemicals:** MKARE (-)

## Full text

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## Figures

7 figures with captions in the complete paper: https://tomesphere.com/paper/PMC12846929/full.md

## References

31 references — full list in the complete paper: https://tomesphere.com/paper/PMC12846929/full.md

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Source: https://tomesphere.com/paper/PMC12846929