I have the same problem. Been on the Induction phase since Monday and have gained 2.5 pounds. This does not make any sense to me and if it wasn't me, I would think the person was lying. Anyway, I started on Monday, weighed on Thursday...was a little dissapointed because only lost one pound.

Then on Monday I weighed again and had gained not only the pound back, but 1.5 more!

Each time I weighed it was at the doctors, same scale. I looked over your list of things which could prevent loss, but don't see how I could gain.

Is water retention a problem (it is the only think I can imagine). I wouldn't think I was retaining because I pee about every 2 hrs since on the plan.

I am in ketosis and have been since Saturday. (Moderate to low ketosis).

I have ranged between 18-31 grms of carbs daily. I did start taking a Naprosin since Thursday. Could that be the cause of the weight gain?