# Effects of Increasing Glycerin Levels in Broiler Chickens

## TL;DR

This study found that adding up to 15% glycerin to broiler chicken diets does not negatively affect their performance, digestion, or nutrient metabolism.

## Contribution

The study demonstrates that glycerin can replace corn in broiler diets up to 15% without adverse effects.

## Key findings

- Glycerin inclusion up to 15% did not affect broiler performance or digestibility of crude protein and fat.
- Relative weights of GIT organs, carcass yield, and nutrient metabolism remained unaffected by glycerin levels.
- Glycerin can be safely included in broiler diets at up to 15% without negative impacts.

## Abstract

Glycerin contributes to the animal’s energy metabolism as an important structural component of triglycerides and phospholipids. The present study was carried out to evaluate the effect of replacing corn with 0, 5, 10, and 15% of glycerin in terms of performance, digestibility, carcass yield, relative weights of gastrointestinal tract (GIT) organs, and nutrient metabolism. Four hundred chickens (40.0 g ± 0.05 g) were distributed in a completely randomized design with four treatments and five replicates. Growth parameters were measured at 7, 14, 21, and 42 days. Digestibility of crude protein and fat, carcass yield, relative weights of GIT organs, and biochemical blood profile were measured. The results were subject to an analysis of variance by Tukey’s HSD test (p > 0.05). The inclusion of 5%, 10%, or 15% of glycerin did not influence performance or affect the crude protein and fat digestibility in broilers (p > 0.05) when compared to that of the basal (0%) diet. Similarly, the supplementation of glycerin levels showed no significant influence (p > 0.05) on the relative GIT organ weights, carcass yield, or nutrient metabolism. Thus, we concluded that glycerin may be included in the broilers’ diets in rations of up to 15%.