Citace:
Strava s nízkym obsahom tukov a vysokým obsahom vlákniny znižuje koncentrácie testosteronu a zvyšuje koncentrácie estrogenu u mužov a naopak.
Mal som silné podozrenie, že vláknina nie je panacea pre všetkých, pretože som nikdy nebol schopný konzumovať odporúčané množstvo vlákniny bez neg. účinkov. To ale neznamená, že vláknina je jed a mnohým môže pomáhať.
How Much FIBER Do You Need Each Day? (Dr. Ken Berry)
https://www.youtube.com/watch?v=LGbpOtg9TQIEffects of dietary fat and fiber on plasma and urine androgens and estrogens in men: a controlled feeding study.
Dorgan JF, et al.
Abstract
We conducted a controlled feeding study to evaluate the effects of fat and fiber consumption on plasma and urine sex hormones in men. The study had a crossover design and included 43 healthy men aged 19-56 y. Men were initially randomly assigned to either a low-fat, high-fiber or high-fat, low-fiber diet for 10 wk and after a 2-wk washout period crossed over to the other diet. The energy content of diets was varied to maintain constant body weight but averaged approximately 13.3 MJ (3170 kcal)/d on both diets. The low-fat diet provided 18.8% of energy from fat with a ratio of polyunsaturated to saturated fat (P:S) of 1.3, whereas the high-fat diet provided 41.0% of energy from fat with a P:S of 0.6. Total dietary fiber consumption from the low- and high-fat diets averaged 4.6 and 2.0 g.MJ-1.d-1, respectively.
Mean plasma concentrations of total and sex-hormone-binding-globulin (SHBG)-bound testosterone were 13% and 15% higher, respectively, on the high-fat, low-fiber diet and the difference from the low-fat, high-fiber diet was significant for the SHBG-bound fraction (P = 0.04). Men's daily urinary excretion of testosterone also was 13% higher with the high-fat, low-fiber diet than with the low-fat, high-fiber diet (P = 0.01). Conversely, their urinary excretion of estradiol and estrone and their 2-hydroxy metabolites were 12-28% lower with the high-fat, low-fiber diet (P < or = 0.01). Results of this study suggest that diet may alter endogenous sex hormone metabolism in men.
https://academic.oup.com/ajcn/article/64/6/850/4655243