Ancient TB Case Shows the Power of Vitamin D
January 08, 2008
Paleontologists examining a 500,000-year-old skull discovered in Turkey have found the earliest known evidence of tuberculosis – a peril that your ancient ancestors encountered as they migrated out of Africa.
The discovery lends support to the theory that dark-skinned people who migrate out of tropical climates tend to have lower levels of vitamin D, which can adversely affect their immune system.
Dark skin protects against the intense ultraviolet radiation of equatorial countries, but this adaptation became a liability during early migration to more temperate latitudes where sunlight exposure was less prevalent.
Then, as now, your risk of vitamin D deficiency increases when you live in temperate zones or have less access to natural sunlight.