Does coffee affect weight loss ?

Just wondering if coffee affects Wt loss as it's a stimulant and affects your blood sugar levels I was taking it for first three weeks then in last two weeks have been using decaf by default
I thought it was caffinated znd as I don't weigh myself and only get weighed in chemist I wonder if it affects losses ?

looking at your looses it isn't.. keep up the good work xx

Thanks for reply Jaynie being the paranoid android that I am I went to pharmacy and got a ketostick
and it was dark purple so answered the question myself ! X