THIS is what's wrong with a lot of "scientific" studies. This is the trouble with extrapolating from individual experience to universal applicability. There's a lot more going on than the experimenter takes into account.
THIS is why studies historically recruited healthy young men to determine baseline physiological response to drugs, diets, or anything else they wanted to test -- it may reveal SOME universally applicable information, but then again there are fewer variables confounding what is actually HAPPENING and YMMV.
THIS is why it's a mistake to start with the experiences of one (or several) ATYPICAL individuals and assume that what happens with them is representative of others. Colpo is atypical. Wooo is atypical. _I_ am really atypical. Whereas what we experience may apply to other people LIKE US, "normal" people don't have responses that are identical to somebody who doesn't spend his/her LIFE working out, or who isn't significantly weight-reduced and leptin-deficient, or who isn't nutrient-absorption-inept.
I could go on and on. People who are deficient in a particular vitamin or mineral will see huge improvement with supplementation, but the replete won't. Some people convert beta-carotene to retinol a lot better than others. I have a few one-size-fits-all dresses that actually DO look good on me, but the secret is that they're totally shapeless on their own, and MY shape makes up for the fact that i'm under-average in height. Someone my height who is skinny would find the hemlines pudding on the floor. A taller woman who has the same measurements would find them way too short.
No, there may be such a thing as "one size fits MOST," but "one size fits ALL" is obviously bullshit.