Which ethnic group is more sensitive to UV radiation and susceptible to premature ageing if overexposed?

The Caucasian ethnic group is more sensitive to UV radiation and susceptible to premature aging when overexposed due to several factors related to skin pigmentation. Individuals with lighter skin tones generally have lower levels of melanin, which provides natural protection against harmful ultraviolet rays. Melanin is the pigment responsible for skin color, and higher melanin concentrations, found in darker skin tones like those of African Caribbean and Hispanic ethnicities, offer a degree of UV protection.

Excessive UV exposure in individuals with lighter skin can lead to skin damage, including photoaging, which manifests as wrinkles and sun spots. This susceptibility emphasizes the importance of effective sun protection measures, especially for those with lighter skin. The other ethnic groups mentioned typically have more melanin in their skin, which decreases their likelihood of experiencing the same level of damage from UV exposure.