Hi jb
Think ur on the same pre op as me. Slim fast, stock cube, chicken fruit veg.
I'll b honest I haven't had that problem. But everyone's different. Check ur diet sheet for a list of side effects. I've been very lathergic, bad breath, sore head and day 3 n 4 I cdnt sleep. But they are all symptoms of goin into ketosis. If in doubt check google or give ur provider a wee call. But it was maybe a once off xx