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FDA Extends Educational Period for New Policy on Compounding Animal Drugs from Bulk Drug Substances

The Food and Drug Administration has delayed enforcement of its finalized guidance regarding compounding animal drugs from bulk drug substances until April 2023.

The Food and Drug Administration issued final guidance, unveiled in April, on the use of bulk drug substances for compounding animal medications. Under Guidance for Industry #256, Compounding Animal Drugs from Bulk Drug Substances, the FDA delineates the circumstances under which it will exercise enforcement discretion related to violations of the Federal Food, Drug, and Cosmetic Act for drug approval, labeling, and manufacturing when pharmacists and veterinarians compound drugs from bulk drug substances for animal patients.

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Validating Net Energy in Commercial Swine Systems - Gustavo Lima

Video: Validating Net Energy in Commercial Swine Systems - Gustavo Lima


In this episode of The Swine Nutrition Blackbelt Podcast, Gustavo Lima, PhD candidate at Iowa State University, explains how soybean meal net energy is evaluated using growth assays and calorimetry. He discusses caloric efficiency, validation under commercial conditions, and differences between controlled and real-world environments. Gustavo also highlights practical implications for diet formulation and ingredient valuation. Listen now on all major platforms!

“Indirect calorimetry provides a precise estimation of ingredient energy, yet validation under production conditions remains essential for accurate application in real systems.”

Meet the guest: Gustavo Lima / gustavo-lima-a9867127 is a PhD candidate in Animal Science at Iowa State University, specializing in swine nutrition, ingredient evaluation, and energy metabolism. With over 15 years of experience across Latin America, his work focuses on soybean meal utilization, caloric efficiency, and applied research for commercial production systems.