I came across an article that suggests high-protein diets and ketosis actually lower t-levels (italics and paragraph format mine, for emphasis):
"Some research on high protein diets deals with the effects on very obese people and weight loss. While this may not seem applicable to you, read on and we will put it together for you. In obese men, feeding 600 calories a day with 400 calories from protein (50 grams of beef protein and 50 grams of casein) induces lower levels of T than fasting does (12).
Normally, when the kidneys filter T out of the blood, some T gets reabsorbed back out of the kidneys into the blood. The researchers stated that the additional protein in the diet generated more ketones. They concluded that the ketones were filtered out of the blood by the kidneys and were reabsorbed back into circulation preferentially over T
While most people reading this may not be obese, higher protein diets are definitely in vogue, more so for bodybuilders and powerlifters than other groups of athletes. The potential exists that if a ketogenic diet like the Atkins Diet or a cyclical ketogenic diet like the Anabolic Diet or Bodyopus is followed, than urinary excretion of T will be greater during the ketogenic phase of the diet."
Admittedly, this was an article that came up after googling 'protein and testosterone levels', a search that provided links to some pretty rediculous testosterone diets. One recurring theme I did come across was that carbohydrate restriction (a side effect of paleo diet) will lower testosterone levels.
- Does anyone know whether ketosis lowers t-levels?
- does anyone know whether low carbohydrate consumption lowers t-levels?
- does anyone know whether high protein consumption lowers t-levels?
- what are the biological mechanisms of testosterone production?
It seems like a lot of people doing paleo have seen increased, or at least normalized, libido and energy increases in general.