Another great science based look at these supplements, thanks Dylan.
Maybe covering 'additional protein' for muscle recovery and creatine with cycling/gym training?
Cav and beetroot juice, "pissing rainbows". Doesn't mean it actually played a positive role for him though, but likely not negative either.
I've tried drinking a litre of beetroot juice between breakfast and the start of a 4-hour race and figured that at least I'm well hydrated, with no notable side effects for me either. Gotta hydrate with something, right? Beats (ha ha) carrying all the hydration in bottles or stopping in feed-zones.