Could Sodium Bicarbonate, the active ingredient of baking soda, be of use to increase performance?  The recent study:

concluded that Sodium Bicarbonate does demonstrate ergogenic efficacy for resistance exercise.  In particular the endurance to failure noticeable increased from the placebo group.  And although the study was conducted by way of resistance exercise, one can make an argument that supplementing with Sodium Bicarbonate could help one’s endurance in cycling.