The direct impact of palmaria palmata extract on acne is unknown. This ingredient is not generally in acne treatment products. However, it is in numerous moisturizing and anti-aging creams and serums. Other types of seaweed ingredients have higher comedogenic ratings that can clog pores. When using new products or ingredients such as dulse extract start with a small patch of skin to see how it reacts. This is especially important for those with sensitive or blemish-prone skin.