Questions & Answers

August 16, 2009

Another Q&A. Click here to see all Q&A’s.
Intermittent Fasting and TestosteroneFirst a question related to the effects of dieting on testosterone and libido/reproductive function in general –
Q: “My sex drive just winds down to nearly nothing when I’m running an intense caloric deficit. Is there some documented/anecdotal correlation on this, or is it random according to the individual?”
A: It’s not random, it’s a fact that weight loss/calorie restriction, even moderate in nature, causes a delayed response to gonadotropin-releasing hormone (GnRH). This neurohormone is secreted in a pulsatile manner from the hypothalamus, and upon binding to receptors in the pituitary gland, it activates synthesis of reproductive hormones, luteinizing hormone (LH) and follicle-stimulating hormone(FSH). This axis is partially under control by “master” hormones involved in sensing the general energy status of the body; leptin and insulin, for example.
An energy deficit lowers leptin, which in turn impacts the reproductive axis negatively. This makes […]

Original post by noreply@blogger.com (Martin Berkhan)

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