The use of oxidized fats in pig nutrition (Part 3/3)

Key concept

Fat quality is a critical factor in pig nutrition.
Lipid oxidation can negatively impact animal performance, immune function, intestinal health, and meat quality.

Introduction

In modern swine production, nutrition is one of the main determinants of growth performance, health status, and production efficiency.

Fat is an essential component of pig diets because it:

  • Improves energy density
  • Enhances feed palatability
  • Supports growth performance

However, fat quality is crucial.
Oxidized fats may compromise both animal health and the quality of the final pork product.

Lipid oxidation occurs when fats are exposed to:

  • Oxygen
  • Heat
  • Light
  • Metals

This process generates toxic compounds capable of damaging biological systems and reducing the nutritional value of fats.

Impact on pig health and performance

The consumption of oxidized fats has been associated with several negative effects in pigs:

  • Reduced weight gain
  • Lower feed efficiency
  • Negative health effects

Oxidized fats can induce oxidative stress, creating an imbalance between free radical production and antioxidant defenses.

Oxidative stress may cause cellular damage and impair immune function, making pigs more susceptible to disease.

Use in piglets and finishing pigs

Piglets are particularly vulnerable to oxidized fats because of:

  • An immature immune system
  • Rapid muscle growth
  • High nutritional demands

Fats play a crucial role during early development, but oxidized fats may increase oxidative stress and impair growth.

Toxic compounds such as aldehydes and ketones may lead to:

  • Cellular damage
  • Oxidative stress
  • Antioxidant imbalance

Reduced growth performance

One of the earliest signs of oxidized fat consumption is a reduction in growth rate and feed efficiency.

Piglets fed diets containing oxidized fats showed significantly lower daily weight gain compared with piglets fed fresh fats.

Vitamin E depletion

Research showed a loss of serum vitamin E levels in piglets fed oxidized oil, even when diets were supplemented with higher vitamin E levels.

Antioxidant response under stress

The reduction in serum vitamin E suggests increased antioxidant demand under dietary oxidative stress conditions.

Higher vitamin supplementation may not fully compensate for the oxidative damage caused by poor fat quality.

Effects on intestinal health and immunity

Oxidized fats can significantly alter intestinal health in piglets.

  • Induce inflammatory responses
  • Alter mucin-related gene expression
  • Damage jejunal mucosa integrity

Damage to intestinal tissue may compromise nutrient absorption and increase susceptibility to infections.

Indicator Main observation
TNF-α Higher inflammatory response with oxidized fish oil
IL-6 Increased inflammatory activity
MUC2 Reduced mucin expression indicating intestinal impairment
Table 1.
Effects of oxidized fish oil on inflammatory indicators and
mucin-related gene expression in weaned piglets.

Effects on meat quality

The use of oxidized fats in pig feeding may negatively affect meat quality and economic returns.

The accumulation of lipid oxidation products
may deteriorate meat flavor, odor, texture, and shelf life.

  • Shorter shelf life
  • Greater susceptibility to rancidity
  • Lower consumer acceptance

Fat quality in pig diets directly affects food safety, consumer perception, and market value.

Mitigation strategies

1. Control of fat quality

Rigorous quality control of fat raw materials is essential before feed inclusion.

  • Peroxide levels
  • Lipid oxidation indicators
  • Storage conditions

2. Use of antioxidants

Dietary antioxidants may help reduce oxidative damage:

  • Vitamin E
  • Vitamin C
  • Phenolic compounds

3. Proper storage and handling

Correct storage and handling are critical to minimizing exposure to heat, light, oxygen, and metals.

Final considerations

The use of oxidized fats in pig feeding is highly relevant because of its implications for animal health, production efficiency, and final meat quality.

  • Use high-quality raw materials
  • Prevent oxidation during storage
  • Apply proper dietary management
  • Use antioxidants when necessary


Through proper diet management and oxidation control strategies, producers can reduce risks, improve animal performance, and ensure high-quality pork products.

🔒 Contenido exclusivo para usuarios registrados.

Regístrate gratis para acceder a este post y a muchos más contenidos especializados. Solo te llevará un minuto y tendrás acceso inmediato.

Iniciar sesión

Regístrate en nutriNews

REGISTRARME