Testosterone Decreases after Ingestion of Sugar (Glucose)

"Men with low testosterone should have their hormone levels retested after they fast overnight because eating may transiently lower testosterone levels, a new study concludes.

The authors found that the glucose solution decreased blood levels of testosterone by as much as 25 percent, regardless of whether the men had diabetes, prediabetes or normal glucose tolerance.

Two hours after glucose administration, the testosterone level remained much lower than before the test in 73 of the 74 men, a statistically significant difference, the authors reported. Of the 66 men who had normal testosterone levels before the test, 10 (15 percent) became hypogonadal at one or more time points during the test.

The results did not differ by changes in insulin levels, according to the abstract. Other hormones that could change testosterone measurements also did not appear to affect results. Hayes said more research is needed to find the factor or factors responsible for this drop in testosterone.

Because glucose intake, and likely food, decreases testosterone, she said, “This research supports the notion that men found to have low testosterone levels should be reevaluated in the fasting state.”

The idea that everytime we eat our Testosterone levels may fall for several hours is quite a scary one. ( particularly for those of us who like to eat very often )

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