is it true that breastfeeding helps you lose weight?

yes

I've lost more than my pre baby body

I think so...I had twins and looked a damn mess and breastfeeding helped me so far! I am 10lbs over what I was prepregnancy and I have NOT been trying and I gained easily 60lbs

It is also an immune booster for baby and can prevent certain cancers :)

My baby is a month Tuesday and I'm 2lbs from my pre pregnancy weight.

Yes!