I like this one from A Aragon. The phenomenon of imprecise terminology bugs those of us most constrained by logic. In that vein, eating "clean" vice "dirty" has always left me wondering "WTF does that mean?"
Seemingly, anything the speaker wants it to. Too often, it doesn't mean anything.
Highlights:
Next up is a recent study by Madero and colleagues, comparing the 6-week effects of a low-fructose diet (less than 20 g/day) or a moderate-fructose diet (50-70 g/day) mostly from whole fruit [16]. The moderate-fructose group lost significantly more weight than the low-fructose group (4.19 kg versus 2.83 kg, respectively). Notably, the moderate-fructose group lost slightly more fat, but not to a statistically significant degree. Unfortunately, body composition was measured with bioelectrical impedance analysis (BIA) instead of something more reliable like DXA. Nevertheless, bodybuilders afraid of fruit would have to admit that the dirtier diet prevailed in this case. Trans fatty acids (TFA) have earned a lot of bad press for their adverse effects on biomarkers of cardiovascular health [17,18]. However, some research indicates that not all TFA are harmful. A distinction should be made between industrially produced TFA via hydrogenation of vegetable oils, and naturally occurring TFA in dairy and meat [19]. Vaccenic acid, the main form of TFA in ruminant fats, might actually lower the risk for coronary heart disease [20]. Currently, there’s no controlled human research specifically comparing the effects of TFA with other types of fats on body composition. In any case, the fitness-conscious population has nothing to worry about unless they start indiscriminately gorging on fast food, cooking with vegetable shortening, and pounding loads of processed/packaged pastries and desserts.
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