Among 99 US men, those eating the most total fat had 43 percent lower total sperm counts and 38 percent lower sperm concentrations than those eating the least, a Human Reproduction study found. Saturated fat showed a similar pattern, while high omega-3 intake tracked slightly higher counts.
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Food
Cola may lower sperm counts
A Danish study of more than 2,500 young men found those drinking a quart or more of cola a day averaged 35 million sperm per mL against 50 million in non-drinkers. It was not a trial, and the researchers suggested lifestyle rather than caffeine may explain the difference.
Chemical
Low-Level Fluoride Linked to Sperm Damage in Animals
Two 2007 animal studies tested water fluoride at 1 to 10 ppm, low levels for rodents. Reddy's team linked 4.5 ppm to reduced sperm count, viability and testicular enzyme activity; Dvorakova-Hortova's found 10 ppm impaired sperm capacitation, with no effect at 1 ppm unless aluminum was added.
Food
Fatty acids may affect men's fertility
Among 150 Iranian men, infertile men had higher ratios of omega-6 to omega-3 fatty acids in blood and semen, while fertile men had more ALA, EPA and DHA. The authors call for research into whether omega-3 supplements could help treat male infertility.
Comments
Soyfoods Do Not Impact Sperm Count
Researchers quoted here say headlines tying soy to lower sperm counts overstate a small retrospective study. Jorge Chavarro found soy and isoflavone intake unrelated to sperm count, ejaculate volume, motility or morphology, and his 'high' intake category was modest.
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