The document summarizes a study on the effects of supplementing broiler chickens' diets with the probiotic Saccharomyces cerevisiae. The study found that supplementing diets with 0.5-2% S. cerevisiae resulted in increased body weight gain, feed consumption, and feed efficiency in broilers compared to the control group. No negative effects were observed on organ weights or hematological parameters. The beneficial effects are thought to be due to the nutritional and immunological impacts of S. cerevisiae on the intestinal microflora.