On skin tone and diet:

>someone asked about eating carrots in order to get a healthy-looking "tan"

The thing is that it's not a matter of a "tan", since that's related to increased skin melanin due to sun (UV) exposure. It's therefore nothing you can affect through sun exposure. It's rather a matter of making the skin a bit more red/orange, by eating things that contain different "carotenoids". These substances end up in your skin, to varying degrees. This seems to work as a cue for "healthy person" when people examine faces. This apparently affects how attractive people are rated by others.

It is absolutely possible to change your skin hue, and seems likely that it will impact how others perceive you. +4-7 portions is what's recommended based on the 1st-2nd studies. Carrots, tomatoes. Pills work as well. Dosage depends on the brand.

Don't worry about carotenosis. Increase your intake gradually. The hue change should take weeks, and will disappear in months.

http://www.plosone.org/article/info:doi/10.1371/journal.pone.0032988

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2780675/

http://www.st-andrews.ac.uk/~go10/wp-content/media/Evolutionary-Psych-paper-2012.pdf

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