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“Although we did not measure LH and follicular stimulating hormone (FSH) in this study, our previous studies in the rats showed that the baseline serum LH and FSH as well as their response to gonado-tropin releasing hormone (GnRH) administration were higher in the zinc-deficient animals, but their testosterone response was lower in comparison to controls.”
“In zinc-deficient sickle cell anemia patients and chronic uremics undergoing hemodialysis, baseline LH and FSH were higher than the LH and FSH of
controls and the serum testosterone concentration was low.”
“These observations support the concept that the effect of zinc is primarily on testicular testosterone secretion.”
This would mean that zinc deficiency might show up in blood results as more of a ‘primary’ hypogonodal pattern. That is, low T, but maybe normal/high LH and FSH.
The fact that the general post-finasteride pattern seems to be low T and low/normal LH and FSH might then indicate that zinc deficiency is truly not at issue here.