Saturated fat are used in production of testosterone.

http://jap.physiology.org/content/82/1/49.short

Significant correlations were observed between preexercise testosterone and percent energy protein (r = −0.71), percent energy fat (r = 0.72), saturated fatty acids (g ⋅ 1,000 kcal−1 ⋅ day−1;r = 0.77), monounsaturated fatty acids (g ⋅ 1,000 kcal−1 ⋅ day−1;r = 0.79), the polyunsaturated fat-to-saturated fat ratio (r = −0.63), and the protein-to-carbohydrate ratio (r = −0.59).

(...) . A more impressive finding was that dietary nutrients may be capable of modulating resting concentrations of testosterone.

Notice the negative correlation for polyunsaturated fat-to-saturated fat ratio.

I do eat meat and use animal products. However one still needs to prove this is ethical practice. I eat meat because my religion allows me too. I just was curious of RM's reason to eat meat seeing as Vegan Gains didn't allow her to explain herself.

"What good are cows if we aren't eating them?"

Well their skin made some very excellent boots that I bought recently, so there's that as well.

What good are cows if we aren't eating them?