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Definition: "An ergogenic aid is any substance or phenomenon that enhances performance "
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21.09.2012 |
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Wheat bran has anti-oestrogenic effect in humans too
Yesterday we wrote that high-fibre wheat bran supplementation helped estradiol to be eliminated faster out of rats' bodies. Human studies from the 1990s confirm that wheat fibres can reduce estradiol levels – wheat bran reduces them by ten to twenty percent.
In 1997 a Kellogg sponsored study was published in Nutrition, in which pre-menopausal women were given 5, 10 or 20 g of wheat bran daily for two months. The supplement that the researchers used was All Bran, manufactured by the sponsor. The 10 g dose lowered the oestrogen level the most, the researchers discovered.
The researchers took into the women's menstrual cycle and examined separately the effect of fibre supplementation during the follicular [table immediately below] and luteal [second table below] phases. During the follicular phase the women's estradiol and oestrone levels decreased by 6 and 19 percent respectively. During the luteal phase the decreases were 26 and 14 percent respectively.
Estradiol levels are higher during the luteal phase than during the follicular phase. And the higher the estradiol level in the blood, the stronger the oestrogenic suction power of wheat bran.
Daily supplementation of about 15 g wheat bran lowered estradiol levels by 15 percent.
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