Too Much Fat May Harm Sperm Quality

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Higher total fat intake was negatively related to total sperm count and concentration in an analysis of data from 99 men (mean age 36.4 years), according to findings published online ahead of print in Human Reproduction.

A team led by Jill A. Attaman, MD, showed that compared with men in the bottom third of fat intake, those in the highest third had a 43% lower total sperm count and 38% lower sperm concentration. Saturated fat intake drove this association.

Levels of saturated fatty acids in sperm were also negatively related to sperm concentration, but saturated fat intake was unrelated to sperm levels.

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