No worry about zinc. As long as she keeps the dose reasonable (say
less than 100 mg/day), there should be no problem (for her with too
much zinc). The baby will not get too much.
I wrote to Lactnet that saying migraines caused by breastfeeding while
menstruating is idiotic. That goes into the list of "stupidest
advice" which appeared a few weeks ago.
Jack Newman, MD, FRCPC