Many cyclists apply embrocation cream to their legs in colder weather because it makes them feel warmer. I understand wanting to have an extra "weather-barrier", in the form of the oil(s) that make up the majority of embrocation. However, the ingredient that causes the "warming" feeling in embrocation cream, capsaicin, is a vasodilator. In the long run, wouldn't that lead to colder legs, seeing as it would expose more blood to the colder temperatures at skin level?
Wouldn't it be better to just use oil (without capsaicin) to get the "barrier" effect, instead of embrocation cream? Are there any studies indicating that embrocation (or topical capsaicin) improves performance in colder weather?