Nearly 200 young men in the U.S. were asked to follow diets containing a variety of fruits and vegetables before testing to see what effect it had on sperm. Researchers at Harvard University found yellow and orange foods were found to help make the sperm stronger, according to a story in The Daily Mail.
The boost was attributed to pigments called carotenoids because the body converts some of these into health-boosting antioxidants. These include beta-carotene, which the body can make into the antioxidant vitamin A.
The sperm-boosting qualities come from chemicals called carotenoids, which give such foods their familiar colour. Antioxidants help to neutralize free radicals, destructive groups of atoms that are a by-product of metabolism and can damage cell membranes and DNA.
Sweet potatoes and melons can enhance the quantity and sperm quality, but carrots were found to improve sperm performance by between 6.5 and 8 per cent, according to a report in the journal Fertility and Sterility.
Red fruit and veg, particularly tomatoes, which contain the anti-cancer chemical lycopene, were associated with fewer abnormally shaped sperm. They contributed to between 8 and 10 per cent more ‘normal’ sperm, said the research, which could make a significant difference for couples having problems conceiving.
The news comes amid reports that the quantity and quality of male sperm is declining in Western countries, with some studies showing that average sperm counts have fallen by over half.
A previous study from Harvard showed that men eating diets containing most saturated fat had the lowest sperm counts and poorer quality sperm. However, men who ate more ‘good’ fats – including omega-3 fatty acids found in fish and some plants – had better quality sperm than those eating less.
Carrots have long been prized for their proven ability to help maintain eye health. They are a prime source of vitamin A, which the retina of the eye needs to function. The vitamin’s antioxidant properties may help prevent cataracts and a deficiency causes night blindness.