and the rise of blood sugar may lower men's testosterone levels,
a new study suggests.
A team of researchers examined the testosterone
levels of 74 men who received a standard dose of glucose and
were then administered an oral glucose tolerance test.
researchers found that 42 men had normal glucose tolerance
on the test, 23 had impaired glucose tolerance, and nine were
newly diagnosed with type 2 diabetes.
of having normal glucose tolerance, prediabetes, or diabetes,
the study authors found that the glucose solution the men
ingested had lowered their testosterone blood levels by as
much as 25 percent.
two hours, the testosterone levels remained much lower than
before the test in 73 of the 74 men.
the test, 66 men had normal testosterone levels, but 10 of
these men became hypogonadal at least once during the test.
on this research, the study authors recommended that men who
have low testosterone should have their hormone levels re-tested
after an overnight fast.
researchers reported their results at The Endocrine Society's
91st Annual Meeting in Washington, D.C.