Determination of the levels of 17-β Estradiol and Progesterone in Cow milk and Baby Follow-on milk by ELISA

Abstract

The current study was undertaken to determine the 17-β Estradiol (E2) and Progesterone (P4) levels in different milk products and some baby follow-on milk samples collected from retail markets in Türkiye. For this purpose, a total of 50 samples from 8 different product groups with different fat levels, production technologies, and production series were analyzed for natural P4 and E2 levels using a commercial ELISA kit. The highest E2 level was determined in UHT whole milk (3%) (39.20 ± 6.73 pmol·L-1) while the lowest level was found in buttermilk (26.50 ± 1.85 pmol·L-1) samples. For P4 levels, the highest concentration were found in baby follow-on milk (0.05). In conclusion, the natural P4 and E2 were detected in all milk and baby follow-on milks at various levels and generally their levels associated with the product fat level.

Keywords

• Progesterone
• estradiol 17-β
• milk
• baby follow-on milk
• ELISA