Relationships between Skin Carotenoid Levels and Metabolic Syndrome

Area of Science:

• Nutritional Science
• Biochemistry
• Preventive Medicine

Background:

• Carotenoids possess antioxidant and anti-inflammatory properties, crucial for metabolic syndrome (MetS) pathogenesis.
• Skin carotenoid (SC) levels, measured non-invasively, correlate with serum carotenoid concentrations.
• Previous research has explored the link between SC levels and MetS.

Purpose of the Study:

• To compare patient characteristics and SC levels between individuals with and without MetS.
• To investigate the relationship between SC levels and clinical parameters associated with MetS.
• To assess the utility of SC measurement in identifying MetS risk within a large population.

Main Methods:

• A cross-sectional study involving 1812 Japanese participants was conducted.
• Skin carotenoid (SC) levels were measured using reflection spectroscopy.
• Multivariate logistic regression analysis was employed to identify factors associated with MetS.

Main Results:

• Participants with MetS exhibited significantly lower SC indices compared to controls (340.7 ± 112.5 vs. 377.3 ± 122.8).
• Lower SC levels were independently associated with MetS after adjusting for confounding factors.
• Male gender, smoking, and unfavorable lipid profiles were associated with lower SC levels.

Conclusions:

• Reduced skin carotenoid levels are significantly associated with metabolic syndrome.
• Non-invasive SC measurement offers a practical tool for detecting individuals at risk of developing MetS.
• This highlights the role of carotenoids' antioxidant capacity in managing MetS.