https://www.selleckchem.com/pr....oducts/methylene-blu
le was fresh or frozen) was 18 or 19%, with the highest Youden indices (range 0.47 to 0.61) and lowest distance to the top left corner criteria (range 0.09 to 0.16); however, we recommend 19%, because this reduces the potential of feeding poor-quality colostrum. The ELISA method was the poorest predictor of colostrum concentration. Age was not found to affect colostrum quality; however, the sample size of this subset was small. Hydrometers are inexpensive and easy to use, whereas Brix methods use only a small amount of
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