Final answer:
Witch hazel is the ingredient that is both stimulating and astringent. Moisturizing creams typically contain emollients, humectants, and anti-inflammatory ingredients that help hydrate the skin and reduce itching and inflammation.
Step-by-step explanation:
The ingredient that is both stimulating and astringent is Witch hazel. Witch hazel has properties that help shrink pores and tighten skin, which is why it is considered astringent. Additionally, it contributes to stimulating the skin by improving circulation. In contrast, ingredients like aloe vera are hydrating, Jojoba oil is primarily a moisturizer that closely mimics the skin's natural oils, and Shea butter is rich in fatty acids and vitamins, making it an excellent emollient and skin moisturizing agent.
Substances in Moisturizing Cream
In a moisturizing cream, one would expect to find substances like emollients which can be oils such as Jojoba oil, or butters like Shea butter, substances known for their skin-smoothing properties. Humectants, such as glycerin or hyaluronic acid, might also be present since they attract moisture to the skin. Additionally, ingredients with anti-inflammatory properties, like bitter vetch or extracts from narcissus bulbs, could be included to help alleviate itching and inflammation.
Properties for Alleviating Skin Issues
The physical or chemical properties that help alleviate itching and inflammation include anti-inflammatory effects that can be provided by various herbal extracts or natural substances. Ingredients like egg whites can also have a tightening and circulation improving effect, which may help with certain skin conditions. The goal of these ingredients is to soothe irritation, provide hydration, and promote skin healing.