Detailed answer

While face oil can provide some hydration, it is not enough to fully replace a moisturizer. Face oil primarily acts as a sealant, locking in moisture and preventing transepidermal water loss. However, it does not provide the same level of hydration as a moisturizer, which is designed to deliver water to the skin. Face oils are best used in conjunction with a moisturizer, especially for those with dry or dehydrated skin. The moisturizer will provide the necessary water content to hydrate the skin, while the face oil can help to nourish and protect the skin's barrier.