It is thought that smokers require 35mg more vitamin C than non-smokers The standard recommended intake is 40mg, so smokers require nearly double this recommendation
And it might not be the climbing, but it has all to do with the security and the whole thing about the psychology behind the routine, and I think also, you know, climbing, it's more about the human interaction, you know, I mean, there's some people that aren't so good with humans and then they're the ones that solo things, or they have some demons they have to squelch somehow so they'll go up and punish themselves on some big wall solo
Aim for 7-9 hours of sleep per night and try to reduce stress, which can also weaken your immune system
your clothing will need to be washed
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