What may increase an individual's sensitivity to ultraviolet radiation?

An individual's sensitivity to ultraviolet (UV) radiation can indeed be increased by medications or cosmetics. Certain medications, which may include both prescription and over-the-counter drugs, can cause photosensitivity, making the skin more susceptible to the harmful effects of UV rays. This reaction can occur due to the chemical composition of these medications, which can enhance the skin's response to light exposure or make it more prone to burning or other forms of damage.

Cosmetics can also play a role in increasing sensitivity. Ingredients such as alpha-hydroxy acids (AHAs) or certain fragrances and preservatives can lead to heightened reactions to UV exposure, resulting in an increased risk of sunburn or skin irritation. Therefore, individuals using such products should exercise caution regarding UV exposure and may need to take additional protective measures such as applying broad-spectrum sunscreen or avoiding direct sunlight during peak hours.

While factors like exercise, weather conditions, and skin type can influence tanning and overall skin health, they do not directly result in an increased sensitivity to UV radiation in the same manner as medications or cosmetics. Weather conditions, for instance, can affect UV levels but do not alter an individual's skin response chemically. Skin type does influence UV susceptibility more generally, but it does not involve the chemical interactions associated with photosensitivity