Re: PP weight loss while breastfreding
That recommendation is for any weight lost after the initial weight loss from birth. You should not be intentionally dieting beyond the 1/2-2 lb per week point. Even then, watch your baby, your supply and your body. If any one of the 3 seems to be "off", then diet less.
It takes 6-8 weeks to establish supply, so you should wait until that point to begin honest dieting. It is however 100% safe (and a good idea) to eat good healthy meals early on to aid in recovery.