Which of the following skin types may be most affected by using iodides in products?

Iodides can be problematic for acne-prone skin types because these skin types already have an overproduction of sebum and an increased likelihood of clogged pores. The introduction of iodides may exacerbate acne flare-ups due to the way these compounds can influence oil production and skin cell turnover.

In individuals with acne-prone skin, the skin's barrier is often compromised, making it more susceptible to irritation and inflammation. Iodides can potentially aggravate these conditions, leading to breakouts or worsening existing acne.

Other skin types, such as dry, oily, or normal, may not show the same level of sensitivity or reaction to iodides because their conditions are not as directly linked to the factors that worsen acne. Thus, it's particularly the acne-prone skin types that need to be cautious with products containing iodides, making this answer the most pertinent in understanding the relationship between skin types and product ingredients.