Zink och dess påverkan av testosteronproduktionen

[Evilvalle]

http://www.doctorshangout.com/profiles/b...es-it-work

Study #1
Effects of dietary zinc depletion on seminal volume and zinc loss, serum testosterone concentrations, and sperm morphology in young men.

Hunt CD, Johnson PE, Herbel J, Mullen LK.
Am J Clin Nutr. 1992 Jul;56(1):148-57.

It is estimated that about 40% of cases in couples not being able to conceive is due to infertility in men. These group of researchers found that zinc deficiency is common and contribute to poor sperm health.
Eleven volunteers were given zinc supplement (and zinc from their diet) ranging from 1.4 to 10.4 mg daily for 35 days.

Those taking only 1.4 mg of zinc daily had less semen volume (2.24 mL) compared to those taking 10.4 mg of zinc (who had 3.30 mL).

Moreover, taking 10.4 mg of zinc resulted in higher blood concentration of testosterone; 26.9 nmol/L versus 21.9 nmol/L in those taking just 1.4 mg of zinc.

The conclusion from this study is that a deficiency in zinc not only reduces the amount of semen per ejaculation, it also lowers testosterone levels, essential for maintaining sex drive.