FAQ: How Does Obesity Impact the Immune System?

Obesity can significantly impact immune system function and contribute to chronic inflammation. In this educational segment, rheumatology nurse practitioner Libby Allen, ARNP, FNP, explains how obesogenic diets alter the gut microbiome and trigger inflammatory pathways that increase cytokines such as TNF-alpha and IL-6, placing the immune system in a persistent low-grade inflammatory state.

The discussion also highlights the role of leptin, a hormone produced by fat cells that regulates appetite and immune signaling. In obesity, elevated leptin levels can disrupt normal metabolic signals and promote immune dysregulation, which may worsen inflammatory and autoimmune conditions such as rheumatoid arthritis, psoriatic arthritis, and psoriasis.

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