The first is an isolated oddity. We all remember Dr Axen and the 17% trans fat diet for rats? Followed by the Complete Idiots with their 14.4% solution.
Of course, no one would ever suggest feeding this much trans fat to humans in a weight loss study. Would they? No, surely not. Except I guess it depends on what you have to prove...
How about this study:

Let's do the math. The ketogenic diet provided bulk calories as fat, 100g/d. A scrummy 35 grams were saturated fat, nice. Next comes 34 grams of OK-ish monounsaturated fat. The obligatory 14g/d of disgusting PUFA is included. Now, maths is complex subject.
One plus one is, err, about, I mean, err, somewhere about one and three quarters. About. I think
OK, let's simplify. 35+34+14=100
Wrong. Yea Gods, I always was bad at math. My worst A level grade. Let's try again
100-(35+34+14)= n, where n is the trans fat content of the fat in the ketogenic diet.
Congratulations Dr Sears. You get the Axen Prize for the maximum undeclared trans fat content of an experimental diet used on humans.
Peter
