Which of the following can aggravate acne skin types?

Kelp can aggravate acne skin types primarily due to its iodine content. Elevated iodine levels can potentially trigger acne flare-ups in individuals predisposed to acne, as it has been linked to the facilitation of acne lesions by contributing to inflammation and clogged pores. This is particularly relevant for those with acne-prone skin, as any substance high in iodine can stimulate the production of sebum or lead to follicular hyperkeratinization, both of which are key contributors to the development of acne.

In contrast, other ingredients often mentioned in the context of skincare for acne, such as chamomile, aloe vera, and jojoba oil, typically have soothing, anti-inflammatory properties or are known for their moisturizing benefits, making them more suitable for managing or alleviating acne rather than aggravating it. Understanding the specific interactions between these substances and acne-prone skin is crucial in selecting appropriate skincare products.