If you're thinking about trying a caveman-style "paleo" diet, in which you would eat a whole lot of meat and sharply cut your carbohydrates, you may want to consider the effect on your aroma. In a study published in the journal Chemical Senses in 2006, 17 male subjects ate a diet containing red meat for two weeks and sweated into pads, which a panel of women volunteers then sniffed to evaluate the aroma. The subjects then switched to a diet without red meat for a similar period, and were subjected to a second smell test for comparison.
The researchers reported that "the odor of donors when on the non-meat diet was judged as significantly more attractive, more pleasant, and less intense." Which implies that red meat consumption has an adverse impact upon one's scent [source: Havlicek and Lenochova].