Optimum Nutrition Newsletter August 2014 | Page 12

DIET
& NUTRITION
TESTOSTERONE & TIMING FOR LEFTIES

Males born during the winter months of November, December
and January are more likely to become left handed research
from the University of Vienna suggests. The study, which was
published in the journal Cortex, analyzed the hand use preferences of 13,000 German and Austrian adults.
It turns out that 7.5% of women favor their left hand while 8.8%
of men are lefties. Factoring in winter-month birthdays elevated
the monthly average of left-handed births to 10.5% among men.
Scientists explained this wintertime boost in left handedness
with a theory that testosterone might delay fetal development
of the left brain hemisphere dominant among right handers, and
more daylight during Spring, Summer and Fall might increase testosterone levels.
True Strength Moment: Whether you prefer to use your right or
left hand, it's interesting to see how naturally produced hormones impact so many different aspects of what it is that makes
each individual unique.
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