The only thing that was demonstrated in that paper is that HCG was better than placebo in improving erection in impotent men.
Impotent men have libido suppressed by logical thinking - "if I can't have erection, I can't have satisfying sex, so why bother thinking of sex". Naturally, when HCG improved erection, they started having more sex, which was wrongly interpreted as HCG having an effect on libido.
That doesn't mean that HCG will boost libido in someone that is not impotent. The paper clearly states that the scores for "desire for sexual activity" ( = libido) was not included in the report because "the observations were not reliable" and "a great number of patients did not understand the meaning of it" and "the majority of patients confused desire for sexual activity with spontaneous erection".
That confusion is very common and the title of the study is misleading. Increase of sexual activity after removing an impotence blockade should not be interpreted as HCG having an effect on sexual desire.
Impotent men have libido suppressed by logical thinking - "if I can't have erection, I can't have satisfying sex, so why bother thinking of sex". Naturally, when HCG improved erection, they started having more sex, which was wrongly interpreted as HCG having an effect on libido.
That doesn't mean that HCG will boost libido in someone that is not impotent. The paper clearly states that the scores for "desire for sexual activity" ( = libido) was not included in the report because "the observations were not reliable" and "a great number of patients did not understand the meaning of it" and "the majority of patients confused desire for sexual activity with spontaneous erection".
That confusion is very common and the title of the study is misleading. Increase of sexual activity after removing an impotence blockade should not be interpreted as HCG having an effect on sexual desire.