It's a terrible article. However my above and beyond useless health visitor used the "you will lose weight" line as part of her bullying campaign to make me continue breastfeeding. I didn't lose weight until I stopped.
I didn't stop because I thought I would lose weight. I stopped as breastfeeding was taking almost every hour of the day, baby was not putting on weight, I was depressed, exhausted and suffering from mastitis which wouldn't clear up.
Useless health visitor's suggestion when I asked about how to move to bottles as I was going back to work full time was to suggest I could easily express enough to see him through the day. This despite the fact I'd told her expressing produced almost nothing.
Oh and to cap it all she refused to give me any information or advice about bottle feeding.
So sorry a bit of a rant but it would have been nice to get some balanced information on the pros and cons of bf and some realistic help.