Sebum Secretion: The Missing Chain in the Pathogenesis of Obesity.

Area of Science:

• Metabolism and Endocrinology
• Dermatology
• Obesity Research

Background:

• Significant daily fat excretion via sebum is often disregarded in obesity studies.
• Calorie loss through sebum can reach up to 500 kcal/day in individuals with oily skin.
• Existing obesity pathogenesis models may not fully account for cutaneous energy expenditure.

Purpose of the Study:

• To highlight the significance of energy loss through the skin (sebum excretion) in the context of obesity.
• To propose the inclusion of "energy loss through the skin" in energy balance equations.
• To prompt re-evaluation of established obesity models considering this factor.

Main Methods:

• Review of existing literature on sebum production and energy balance.
• Theoretical analysis of the impact of sebum excretion on overall energy expenditure.
• Comparative analysis of theoretical obesity models.

Main Results:

• Sebum excretion represents a substantial, yet often ignored, daily calorie loss.
• This overlooked pathway may contribute to discrepancies in energy balance measurements.
• Potential link between factors affecting sebum production and body weight requires further investigation.

Conclusions:

• Energy loss through the skin via sebum is a significant factor that should be incorporated into obesity research.
• Re-evaluation of the Energy Balance Model and Carbohydrate-Insulin Model is necessary.
• Further research is warranted to explore the relationship between sebum production and weight regulation.