Which ingredient is commonly frowned upon for acne-prone skin?

Mineral oil is often viewed with caution for those with acne-prone skin due to its occlusive nature. Being a heavy, greasy substance, it can create a barrier on the skin that traps moisture but also potentially traps dirt, bacteria, and sebum underneath. This can lead to the formation of comedones, which are clogged pores that can worsen acne conditions. Individuals with acne-prone skin are typically advised to choose non-comedogenic products, which are formulated to not block pores. While benzoyl peroxide, salicylic acid, and aloe vera are generally considered beneficial for managing acne due to their antibacterial and anti-inflammatory properties, mineral oil's potential to clog pores makes it a less favorable option in acne treatments.