Protein Shakes While BF?

So I’m struggling with my weight since having my son. I’ve always been small with a high metabolism. I was 150lbs when I had my son and honestly I hoped and prayed I’d keep 20 of the 30lbs I gained during my pregnancy. I was 124 when I got pregnant , dropped to 119 in the first trimester and ended at 150. Now I’m 110lbs and I hate it .

So what I’m wondering is if protein shakes are ok to drink while still breastfeeding (my sons EBF)