Which skin type on the Fitzpatrick scale is associated with excessive tanning but no burning?

The Fitzpatrick scale classifies skin types based on the skin's response to ultraviolet (UV) light, particularly in terms of burning and tanning. Skin type IV is characterized by features such as a medium brown skin tone that tans easily and significantly but typically does not burn. This skin type has a higher amount of melanin, which provides some protection against the harmful effects of UV radiation. Individuals with this skin type are less likely to experience the adverse effects of sun exposure, such as sunburn, compared to those with lighter skin types.

In contrast, skin types I and II are more prone to burning with minimal tanning. Skin type V, while also having a deeper skin tone that can tan well, usually reflects a skin type that is more resistant to sunburn than type IV. However, type IV is specifically known for its significant tanning ability without burning, making it the correct answer in the context of this question.