"You should follow your own advice, Dan." he responds. It's blunt, but in a way he would be blunt with anybody. The things floating around in the undercity of his home dimension were equal parts wondrous and terrifying, and an involuntary brush with that in a grey-walled Alchemax office gave him easy motivation to keep bad habits to coffee and overwork. Manageable, or maybe simply more acceptable with the added robustness of the altered genes.

"The reason they turn that color is because your capillaries - the blood vessels in your extremities - are too constricted to circulate properly. You loose heat easily that way, and the outside cold is dangerous enough."

If he were back home, there'd be more he could do with better tools. But he doesn't have any of that here, simply the knowledge on hand. So he uses what he has.