Daily commuting - are dietary supplements recommended?
The canonical recommendation is for "a complete and balanced diet". Whatever 'supplements' you might need depend on what your current diet is. The recommendations I've been given (I'm 50 and commute 24 miles/day) from a dietitian are vitamin D (because I live in Canada - I suspect that recommendation is obsolete currently while I'm commuting 2 hours/day in summer) and (based on blood test results) perhaps a bit more iron (I'm vegetarian). Some of the important components to consider, IMO, include water, salt, carbohydrates, and, rest/sleep. In summary, perhaps you should talk with a doctor or dietitian.

If you want to discover what your current diet is (which is presumably one important question before deciding how to supplement it - an alternative might be physical exam, blood tests), I quite recommend DietOrganizer.