Vitamin A, E and D3 with Melatonin Concentration in Different Animals Milk According to Seasonal Changes and Periods

Abstract

Hormones and Vitamins are extremely important ingredients for healthy growth, development, and regularity of events in metabolism. In our study, it is aimed to compare melatonin hormone and vitamins A, E, D3 of goats, sheep and cows milk. Our sample consisted of 20 Simental Breed Cows, 20 Akkaraman Sheeps, and 20 Native Breeder Goats. Melatonin hormone was analyzed with Enzyme Plate Reader by using Rel Assay branded kit and to determine vitamin�s levels high-performance liquid chromatography (HPLC). Goat milk melatonin level was at the highest level at night and summer. Regarding goats` milk, Retinol and tocopherol levels were higher in spring than in summer. Regarding sheep�s milk, the melatonin level in the sheep`s milk was most elevated at night and spring. There were also statistically significant differences between spring and summer milk of sheep in terms of Retinol, Tocopherol, and Vitamin D3. Retinol and tocopherol levels were higher in spring than in summer, but vitamin D3 was higher in summer than in spring. Regarding cow`s milk, the amount of melatonin in milk was highest in winter and least in autumn. The amount of melatonin in spring was found to be higher than the amount of melatonin in summer. The amount of melatonin in spring was near to the amount of melatonin in winter, so there was not a statistical significance between them, and the amount of melatonin in summer was near to the amount of autumn, and no statistical significance was found between them.