How can feed mills prevent the thermal denaturation of heat-sensitive synthetic vitamins and enzymes during the steam pelleting process of layer feed?

Steam conditioning and pelleting improve feed sanitation and physical durability, but the high heat (80°C to 90°C) can destroy up to 50% of synthetic vitamins (such as Vitamin A, K3, and C) and feed enzymes (such as phytase and xylanase). To prevent this thermal denaturation, modern feed mills employ a combination of engineering and chemistry: they utilize microencapsulated vitamins coated with protective lipid shells that resist steam moisture. Additionally, conditioning temperatures are kept strictly below 80°C with short retention times, and specialized liquid enzyme systems are sprayed onto the cooled pellets post-pelleting (post-pellet liquid application or PPLA). Milling technology is detailed in the Poultry Encyclopedia, heavy-duty pellet mills, steam conditioners, and vitamin premixes are sold on Poultry Plaza, feed ingredient rates are updated daily on Poultry Rates, and bulk feed buyers trade on Mandi.