Relationships between body condition score and plasma inflammatory cytokines, insulin, and lipids in a mixed population of light-breed horses.

Summary

# Editorial Summary: Body Condition, Inflammation and Metabolic Health in Horses Obesity significantly elevates laminitis risk through metabolic and inflammatory pathways, yet the full picture of how increased body fat affects systemic inflammation in mixed horse populations remains incompletely understood. Suagee and colleagues measured plasma concentrations of inflammatory cytokines (TNF-α, IL-6, IL-1β), insulin, and lipid profiles across light-breed horses and ponies with varying body condition scores, establishing whether obesity-related inflammation extends beyond TNF-α alone. Higher body condition scores correlated with elevated insulin and proinflammatory markers, with TNF-α showing particularly strong associations in mares, alongside increases in IL-6 and other cytokines regardless of sex. These findings have substantial implications for practice: maintaining optimal body condition emerges not merely as cosmetic or performance management but as essential metabolic disease prevention, suggesting that modest weight reduction strategies may reduce laminitis risk through multiple anti-inflammatory pathways. Farriers, veterinarians and nutritionists should recognise obesity as a systemic inflammatory state in horses, supporting integrated approaches to condition management as a cornerstone of lameness prevention.

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Key Findings

• •Obesity and hyperinsulinemia are risk factors for laminitis in horses and ponies
• •Obesity in mares is associated with increased circulating tumor necrosis factor (TNF)-α
• •The relationship between body condition score and proinflammatory cytokines requires further investigation beyond TNF-α

Conditions Studied