Did you point him in a direction of diet? If he's come to you asking questions he's probably at a point of desperation. Heck... I was at a point of desperation when I started paleo. I waited til I started to lose my vision... I bet your co-worker would be receptive.
SW (Nov 22nd 2011): 333
Current Weight as of Nov 25 2015: 248
Short Term Goal: Fit into the shirts I got on my honeymoon at disney and universal in august next year when I go back to for my 1 year anniversary
Met Goal: Be a 2x Shirt, Fit in a standard airplane seat belt without the use of a seat belt extension
Long Term Goal: 166lbs (One day!), Buy whatever cloths I want to wear.
Pain is temporary, quitting is forever- Lance Armstrong #NoExcuses