Pay attention to your supply. if you just started you are probably ok, but if you continue to loose that much weight, I am sure it is unhealthy. Even if lo is getting milk, it might not have enough nutrients. As the pp mentioned you need at least 1800 cal a day. Some people do need even more. Great Job on the weight loss so far!

Minimum of 1800 calories while breastfeeding, I think. I eat between 1800 and 2300 and still lose but not that quickly.

Losing a # a day is most likely water. Drink up! Also, eat 1800 cals minimum. If you get a workout in, be sure to eat back those calories. Eat good fats from nuts, avocado, olives, fish, etc. Babies need fat for their growing brains. If you are bf, then you need to eat those fats to pass along to your baby.

I've had problems with supply. My Ped recommended offering a bottle after feeding. If lo is really hungry lo will learn to take it, but it may take awhile. If he eats it all really fast and then pukes. He is extremely hungry, but he is so used to not eating enough that his stomach can't process it. If you don't like the idea of a bottle there are all sorts of other supplementing options. I recommend asking your Ped.

I've had problems with supply. My Ped recommended offering a bottle after feeding. If lo is really hungry lo will learn to take it, but it may take awhile. If he eats it all really fast and then pukes. He is extremely hungry, but he is so used to not eating enough that his stomach can't process it. If you don't like the idea of a bottle there are all sorts of other supplementing options. I recommend asking your Ped.

This is a good way to shorten the amount of time that you are able to breastfeed. Milk production is largely based on supply and demand (assuming you are giving yourself adequate nutrition and water). Your baby tells your body that he/she needs more milk by nursing longer and more often. If you are giving the baby something else to eat, your body is not going to get that memo. If you want to increase your supply, you are best to nurse more often. Make sure you are eating enough quality foods, getting enough fluids and rest. Some say that oatmeal (or foods containing oats) will help with supply, as may Fenugreek or Mother's Milk Tea.

If baby is not thriving and you are doing all of the above, then supplementing may be necessary. But most people will be ok if they are feeding baby on demand and eating enough.

You can still lose weight while breastfeeding, but a lb a day is too much (even if you are not breastfeeding), especially if it is this far after having the baby and for more than the first week of watching calories.