Anti-parasite drugs 'affect lamb development'
AgResearch scientists have collected the first known data showing behavioural developmental impacts on lambs whose mothers were treated with long-acting drugs for parasites.
That’s the findings from a human clinical trial done for the Pasture Raised Advantage research programme to explore the health and wellbeing benefits of eating pasture-raised beef and lamb as part of a balanced diet, compared to grain-finished beef or a plant-based alternative.
The project, which involved researchers at AgResearch, the University of Auckland, Massey University and the Riddet Institute, shows that red meat is probably a better source of protein for the body than highly processed plant-based products promoted as meat alternatives.
In this first of two clinical trials, 30 participants aged 20-34 years were fed breakfast on four different days and their blood, digestive symptoms and mood were monitored for four hours immediately following the meal.
Breakfast was a burrito that contained a single serving of a different protein each day; pasture-raised beef, grainfinished beef, lamb and a plant-based alternative – served in random order to each participant across the four days.
University of Auckland’s Andrea Braakhuis, who heads up the team of nutrition scientists responsible for the study, says they measured the nutrients in the blood of the participants.
It saw a significant difference in the type and amounts of amino acids that come from the digestion of the protein of red meat compared to the protein of the processed meat alternative.
“Amino acids from red meat were of greater biological value and better absorbed by the body,” she says.
AgResearch senior scientist Scott Knowles says the new generation of plant-based meat analogues are formulated to mimic the taste and basic nutrient composition of meat. But he says very little is known yet about their nutritional quality and health benefits.
“Plant-based alternatives are produced very differently from pasture- raised livestock and they’re marketed as having advantages in environmental footprint and sustainability,” Knowles explains. “Those credentials are still being scrutinised. However, we know for certain that NZ farmers are producing a highly nutritious food in one of the most efficient production systems in the world.”
