Only difference I've noticed with supplements is helping to minimize night cramps in legs. I really need to maintain my magnesium, potassium, and sodium levels when I ride and/or squeeze in a hard workout. The biggest "feeling better" nutritional change for me was changing to a low carb "paleo" or "Atkins" type diet a couple of years ago. Down 40+ pounds and improvement in all health markers. I'm hooked for life in that respect.
Novara bikes are a brand sold by a West Coast chain (REI). Tern makes primarily folding bikes. Do some googling. Family offshoot of Dahon.
I live in the S.F Bay Area.