Michigan Esthetician State Board Practice Exam

Photosensitizers primarily cause what effect on the skin?

1. Reduce oiliness

2. Enhance elasticity

3. Increase sensitivity to sun exposure

4. Decrease pigmentation

The correct answer is: Increase sensitivity to sun exposure

Photosensitizers are substances that increase the skin's sensitivity to sunlight, primarily through making skin cells more reactive to ultraviolet (UV) light. When the skin is exposed to these substances, it can lead to heightened effects from sun exposure, which may include sunburn or increased risk of photoaging and skin damage. This heightened sensitivity arises because photosensitizers can cause a reaction in the skin that makes it more vulnerable to the damaging effects of UV rays. In the context of skin care and esthetics, understanding the role of photosensitizers is crucial, especially when advising clients using products that contain these agents. For instance, certain medications or topical treatments can make clients more susceptible to sunburn, which means recommending appropriate sun protection becomes vital to prevent adverse effects. Other options, such as reducing oiliness, enhancing elasticity, or decreasing pigmentation, do not directly relate to the function of photosensitizers in increasing sensitivity. Instead, they pertain to different skin treatments and conditions that may not involve any photosensitizing agents. Thus, option C accurately captures the primary effect of photosensitizers on the skin.