Effects of different doses of oregano essential oil on growth performance, health parameters, and the gut microbiome-metabolome profile in heat-stressed Pinan cattle (Piedmontese × Nanyang)

Key Points

• Optimal supplementation with oregano essential oil at 7 g/d improved health metrics in heat-stressed bulls, while 14 g/d did not show added benefits.
• The study found that a 7 g/d dose led to better overall health and metabolic function, highlighting the importance of correct dosing.
• The observational analysis evaluated growth performance and gut microbiome shifts in response to oregano essential oil supplementation for cattle at risk of heat stress.
• Findings may indicate the potential for oregano essential oil to support cattle health, especially under heat stress conditions, but need further validation.