Meg asks: << "Casein synthesis is low or absent in early lactation, increases rapidly, and then decreases. Early milk whey:casein is 90:10, then mature milk 60-40 then later lactation 50:50. Why is this different from the generally stated 40:60 ratio. Is that an average?>> The 60:40 ratio is only accurate at one point in time. And that is one of the problems measuring milk composition - it varies so much even within a single day, and even more over time. Linda J. Smith, BSE, FACCE, IBCLC Bright Future Lactation Resource Centre www.bflrc.com 6540 Cedarview Ct., Dayton, OH 45459-1214 USA (937) 438-9458 email [log in to unmask] *********************************************** The LACTNET mailing list is powered by L-Soft's renowned LISTSERV(R) list management software together with L-Soft's LSMTP(TM) mailer for lightning fast mail delivery. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html