Anti-nutritional factors in feedstuffs can be mitigated by:

• A. Freezing only
• B. Light exposure
• C. Increasing roughage
• D. Heat treatment, processing, and enzyme additives

Answer: (D)

Anti-nutritional factors reduce nutrient availability and feed efficiency, so the most effective mitigation combines methods that directly deactivate or degrade those compounds and improve nutrient release. Heat treatment and processing physically alter or destroy heat-labile anti-nutritional proteins and complexes, such as trypsin inhibitors and lectins, and processing methods like extrusion, toasting, soaking, or fermentation can also reduce tannins, phytates, and other ANFs. Enzyme additives go a step further by actively degrading specific anti-nutrients—phytase breaks down phytates to release minerals, while other enzymes help break down fiber components or protease inhibitors, improving overall nutrient utilization.

By contrast, freezing and light exposure don’t reliably neutralize these compounds, and simply increasing roughage won’t remove ANFs; it may alter gut physiology or dilution effects but doesn’t address the anti-nutritional substances themselves.