The last thing to discuss is the list of threats. Vitiligo commonly starts at the age of 20-25. In fact, there is no special age requirement. It all depends on the immune system. All races, ages, and genders are under the equal threat of experiencing vitiligo. This skin condition, however, more frequently is present on the darker skin. In addition, people who have a weak immune system (autoimmune diseases) are more likely to become the ‘victims.’