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Higher feed intake in pigs is linked to elevated cholesterol levels, including HDL and LDL. This suggests overeating beyond growth needs poses a health risk, independent of body fatness.

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Area of Science:

  • Animal Science
  • Metabolic Health
  • Nutritional Physiology

Background:

  • The connection between eating habits and cholesterol is not well understood in humans.
  • Assessing human eating behavior is challenging, limiting research.
  • A pig model offers a viable alternative for studying these relationships.

Purpose of the Study:

  • To investigate the links between feed intake, feed efficiency, eating behavior, and cholesterol/triglyceride levels.
  • To determine if feed intake independent of growth and fatness (RFI) correlates with lipid profiles.
  • To understand the temporal nature of these relationships.

Main Methods:

  • Utilized 202 Duroc barrows, recording individual daily feed intake and behavior via electronic identification.
  • Measured body weight (BW), backfat thickness, and weight gain.
  • Analyzed plasma levels of total cholesterol, HDL, LDL, and triglycerides.

Main Results:

  • High total cholesterol correlated with high HDL, LDL, and triglycerides.
  • Higher BW, backfat, growth, and feed intake were associated with increased cholesterol levels.
  • Residual Feed Intake (RFI) showed a positive correlation with cholesterol, indicating a long-term relationship, while intake rate's effect diminished when corrected for intake amount.

Conclusions:

  • Feed intake, independent of metabolic body weight, growth, and fatness (RFI), is positively correlated with cholesterol levels.
  • Consuming more feed than required for maintenance and growth presents a health risk, irrespective of an animal's fatness.
  • These findings highlight the importance of managing feed intake for metabolic health.