More tofu = lower fertility?
Posted by ampontan on Saturday, July 26, 2008
SKY TV in the UK presents this report on research at Harvard finding that higher soy intake leads to significantly lower sperm counts.
Sperm count ranges between 80 and 120 million sperm per millilitre (million/ml) of semen for normal healthy men.
But researchers in the US found that those with the highest soya intake had average counts of 41 million/ml lower than those of men who did not consume soya products.
Yes, even Sky TV knew the next question was obvious.
The scientists addressed the obvious question of why Asian men, who eat large amounts of soya, still appear to be fertile.
They pointed out that while obesity is increasing at alarming rates in the US, it is still much less common in Asia.
The research also brought more bad news for overweight or obese men, with the link between soya consumption and sperm count being stronger in that group.
Overweight men may be extra affected because their bodies produce more estrogen than slimmer people, the researchers believe.
Here’s a more detailed report on the Harvard study. The researchers said:
…the clinical significance of their research remains to be determined, and further randomised trials are needed.
Considering the population figures in East Asia, I think I’ll take this with a grain of salt pending further trials.
On second thought, I’ll skip the salt. It’s not very appetizing with tofu.