Pregnant w/twins and not eating enough. Protein/meal shakes safe?

Jqadri

I never thought I'd have to say I'm not eating enough!

These love bugs are taking everything from me and I need to eat a lot more. Ketones were tested in my urine, I'm not dehydrated, so has to be caloric intake.

I have Celiac's disease so this makes it harder already(no wheat products).

Are protein shakes safe, any recommendations on a safe brand, so many are not good for growing babies.

Thanks!