Iogurte de leite de cabra com alto teor de melatonina: desenvolvimento, avaliação sensorial e biológica

• Autor(a) principal: Espeschit, Ana Cristina Rocha
• Data de Publicação: 2014
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/504
• topic: Iorgurte de leite de cabra; Leite de cabra; Melatonina; Análise sensorial; Ratos Wistar; Goat Iorgurte; Goat milk; melatonin; Sensory evaluation; Wistar rats; CNPQ::CIENCIAS AGRARIAS::CIENCIA E TECNOLOGIA DE ALIMENTOS::CIENCIA DE ALIMENTOS

Melatonin intake has several benefits to human health, such as modulation of sleep disorders and regulation of the reproductive system, as well as antioxidants and anti- inflammatory properties. A source for the intake of this hormone is goat milk produced from night milking. Although Brazil is a prominent goat raising country, information about the behavior of Brazilian consumers of goat dairy products is scarce. Nevertheless, the supply of high-melatonin goat milk yogurt proved to be a viable alternative to stimulate the consumption of goat milk dairy products. Thus, this study focus on the development of goat milk yogurt produced from night milking, in order to add value to the milk without incurring in large investments from its producers. The best milking time was determined, with peak melatonin concentration at 12:53 a.m. The effects of a diet containing high-level melatonin goat milk and yogurt in the melatonin concentration in the blood of Wistar rats, as well as the concentration of sulphatoxymelatonin in the rats urine, was evaluated. The diet consisting of night milk yogurt resulted in lower rates of consumption and weight gain, while maintaining the feed efficiency coefficient. Higher melatonin levels in the diet did not result in increased plasma concentrations of melatonin or its metabolites in urine. The results allow us to deduce that the obtained product may be used as an adjunct to weight loss treatments. The influence of the information goat milk yogurt or high-level melatonin goat milk yogurt in the acceptance of goat milk yogurt was also evaluated. Information on the production of yogurt from goat milk did not influence product acceptance by consumers, placing the product between the hedonic terms liked it a little and liked it moderately . Information on health benefits increased the acceptance scores of high- level melatonin goat milk, showing the importance of the disclosure of such benefits to its regular, as well as potential, market. Therefore, it is concluded that the production on goat milk dairy products, with added values to health, combined with the disclosure of these values to the population, is an important strategy to increase the consumption of these dairy products.