that's a tough one. I almost didn't let my co-workers know, but on the friday before my monday surgery, I decided I would tell them that I was making a drastic decision for my health and for me ...... I worried about the web of lies I would find myself telling or eluding when the nosey co-workers started asking questions. I figured either way they will talk, and surprisingly they have been extremely supportive and ask lots of questions because others are interested in this option for weight loss. tough call on how to handle your privacy as they are going to see you 'magically' transform right before their very eyes . You can just tell them you've decided to make a lifestyle change and better your health......and leave it at that! LOL good luck -)