Researchers at the Medical University of Graz in Austria recently exposed that sunbaths add to the levels of the male sex hormone in men's blood. Apart from oily fish and meat, Vitamin D is also obtained by exposing body to sunlight. As the doses of vitamin D are increased, level of testosterone raises subsequently, the researchers concluded.

A spokesman for the Sunlight Research Forum in Netherlands said, "Men who ensure their body is at least sufficiently supplied with Vitamin D are doing well for their testosterone levels and their libido among other things".

This new finding came after a previous research that said 69% boost is received by male sex hormone by sunlight. As winter begins, there is a dip noticed in both supply of Vitamin D and testosterone which continues till March. 90% of vitamin D is produced by skin and average level of it is 30 nanograms per milliliter of blood.