I would suspect that the mom's thyroid, not breastfeeding, caused such weight loss. Often moms' thyroids don't bounce back properly after pregnancy so they're either hypothyroid or hyperthyroid. The mom you mentioned sounds like she was hyperthyroid and maybe her thyroid straightened out after weaning. Since she only consulted a nutritionist and not someone who could perform the appropriate thyroid tests, it's hard to say whether or not that was the cause for her incredibly high metabolism. Debbie Gillespie, IBCLC, RLC *********************************************** To temporarily stop your subscription: set lactnet nomail To start it again: set lactnet mail (or digest) To unsubscribe: unsubscribe lactnet All commands go to [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(R) mailer for lightning fast mail delivery. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html