"Chicken Consumption and the Feminization of Male Genitalia"
Sexual selection may have also played a role in penis size.
According to the best available science, three-quarters of women find
both penile length and girth somewhat or very important.
What does that have to do with diet?
Phthalates.
“Phthalates are [chemical] compounds…
used in a wide range of consumer products
[including pesticides, paints, PVC plastic].
However, the contribution of dietary intake to phthalate exposure
has not been well defined.”
Until now.
What’s the problem with phthalate exposure?
“Effects on sexual health and development have been observed
in recent human studies.”
We’ve known phthalates affect the genital development of lab rats,
but for the first time ever, human data has been published.
Simple study.
They measured the levels of phthalate flowing through
the bodies of pregnant women, and then later measured
the size and characteristics of their infant sons’ genitals after birth,
between ages two months to three years.
There was one phthalate particularly associated with a smaller penis:
mono(2-ethylhexyl) phthalate, MEHP.
The researcher concludes:
“These changes in male infants, associated with prenatal exposure
to some of the same phthalate metabolites that cause
similar alterations in male rodents,
suggest that commonly used phthalates may undervirilize humans as well…”
So, what foods should pregnant women stay away from
to decrease their phthalate exposure in hopes of avoiding the phthalate-related
syndrome of incomplete virilization?
The urine levels of thousands of Americans all across the country
were measured, along with their diets,
to find out which foods most significantly correlated with phthalate body burden.
They looked at dairy, eggs, fish, fruit, poultry, potatoes, tomatoes,
vegetables in general, and red meat.
The food associated with the greatest exposure to phthalates
was poultry consumption.
So, for example, in one analysis, while total dairy consumption was
significantly associated with one of the phthalate chemicals,
it was the eggs and the poultry consumption, in particular,
that was a significant predictor of levels of MEHP, as well as total phthalates.
This is consistent with what’s been found measuring
phthalate levels directly in foods.
Yes, there’s some in other meat products, fish, fats, oils, and milk,
but poultry was the worst,
“suggesting…that an increase of one ounce of poultry per day is associated
with an increase in DHP metabolite levels of approximately 5.7%.”
A single chicken breast can be eight ounces.
And one of those metabolites is MEHP,
the phthalate most closely tied to small penis size in infant boys.
In fact, that was the most statistically significant finding
in the whole study—
the correlation between poultry consumption and MEHP.
In addition to a smaller penis, MEHP appears to increase the odds of
boys later growing breasts, 25-fold, and then decreased testosterone later in life.
Now, look, just because you have a smaller penis doesn’t necessarily mean
you’re less masculine, as was widely reported.
But there was actually a study published last year showing that
the phthalates found in chicken were significantly associated with
less masculine behavior in boys, such as playing less with trucks,
and more with dolls, for example.
The chicken phthalates have also been associated with increased odds of
Caesarean section,
diminished child intelligence (particularly in boys),
attention deficit and hyperactivity disorder (ADHD) symptoms,
later in life, abdominal obesity, altered thyroid function,
damaged sperm, and, as we learned this summer, a lower sperm count.
Why is chicken so contaminated?
Maybe it’s just leaching into the meat from the plastic wrap packaging?
Probably not.
The finding that egg consumption is significantly associated with levels of the
penis-shrinking MEHP suggests that chickens themselves
may be contaminated,
and that food is not being contaminated just through packaging and processing.
Maybe it’s in the feed?
Phthalates have been intentionally fed to chickens in hopes of
decreasing the cholesterol levels in their muscles and eggs,
but it didn’t work.
Regardless, if there is one thing pregnant women may want to avoid
during pregnancy to protect their sons’ normal development,
it would be to avoid poultry.