Eh. I think OP might do well to look at his/her nutrition; I disagree that a big increase in calories or protein, or "riding food" (food during a ride) is automatically called for just because someone starts biking to work. Most Americans consume too many calories as it is, and getting off the couch and doing a little exercise isn't going to create a need for more calories in most cases. What it does call for is better nutrition: an absence of junk and a presence of nutritious food. You don't do yourself any favors by packing Powerbars on top of your existing calories, particularly not in the middle of the average commute, which really doesn't need any supplementary nutrition at all.