It's actually surprising how quickly applying rationality can make one more attractive. Winning at nutrition, fashion, fitness take very little time if you're body is at all typical, especially if you're in a community where resources can be pooled. Posture and confidence are harder, but not much. The fact that there are virtuous cycles there also help.

I've seen real gains in attractiveness over the past several years, with noticeable progress on the scale of months. I've achieved gains of 3-4 points on a 10 point scale.