The term 'cosmetic additive' can refer to a variety of substances that are added to cosmetics to improve their performance or appearance. Two of the most common cosmetic additives are aloe and vera, both of which are four-letter words. Aloe is a plant extract that is known for its moisturizing and healing properties, while vera is a type of plant extract that is often used as an antioxidant and anti-inflammatory agent. Both of these substances are widely used in cosmetics to improve the texture, feel, and overall quality of the product.