Monoglyceride Piglet Diet Study
Antibiotic alternatives in livestock production face a major test as researchers evaluate medium- and short-chain fatty acid monoglycerides for weaned piglets, Frontiers in Veterinary Science reported.
While traditional antibiotic use improves animal feed efficiency and health, misuse drives bacterial resistance and residues that challenge sustainable farming.
Y. Li, Y. Liu, C. Lu, and H. Cao evaluated a commercial mixture of three monoglycerides combined in a 1:1:1 weight ratio as an alternative to antibiotics in weaned piglets. The study tested glycerol monopropionate, glycerol monobutyrate, and glycerol monolaurate to determine their impact on animal performance and gut health.
Researchers assigned piglets to five dietary treatments
Researchers assigned a total of 180 Duroc × Landrace × Yorkshire weaned piglets, aged 24 ± 1 days, to five dietary treatments for 42 days following a 3-day adaptation period. The groups included a basal diet control, an antibiotic diet containing 500 mg/kg of enramycin, and three test diets with the monoglyceride mixture at 600 mg/kg, 1,000 mg/kg, and 1,400 mg/kg.
The trial tracked production performance, diarrhea incidence, serum biochemical parameters, immunity, nutrient digestibility, and fecal microbiota. The 1,000 mg/kg dose increased final body weight and average daily gain while lowering the feed conversion ratio compared to the control group.
Growth Performance and Diarrhea Rates
The antibiotic group and the 1,000 mg/kg monoglyceride group both showed significant gains in final weight and average daily gain. Diarrhea rates dropped significantly in the antibiotic group, the 1,000 mg/kg group, and the 1,400 mg/kg group.
The lowest dose of 600 mg/kg produced no significant effects on growth or diarrhea incidence. The highest dose of 1,400 mg/kg reduced diarrhea but failed to improve growth performance.
The 1,000 mg/kg dose improves immunity and gut microbiota
The 1,000 mg/kg treatment raised total serum proteins, albumin, and total antioxidant capacity without elevating alanine aminotransferase activity. This dosage also enriched beneficial intestinal bacteria, specifically Lactobacillus and Eubacterium populations.
Researchers concluded that supplementing piglet diets with the monoglyceride mixture at 1,000 mg/kg improves growth, boosts antioxidant capacity, and modulates gut microbiota. The findings demonstrate the mixture’s viability as an effective antibiotic alternative at the correct dosage.
What specific monoglycerides and dosages were tested?
What specific monoglycerides were tested in the piglet study?
The trial evaluated a mixture of glycerol monopropionate, glycerol monobutyrate, and glycerol monolaurate combined in a 1:1:1 weight ratio.
How long did the experimental feeding period last?
The trial ran for 42 days following a 3-day adaptation period where all 180 piglets received the basal diet.
Which dosage yielded the best overall results for the weaned piglets?
The 1,000 mg/kg dosage improved growth performance, reduced diarrhea, increased antioxidant capacity, and enriched beneficial gut bacteria without adverse liver enzyme activity.