Final answer:
Hydration therapy is a treatment using moisturizers to infuse water-soluble products into the skin for deep rehydration and improved delivery of active ingredients due to the skin's selective permeability.
Step-by-step explanation:
The treatment that infuses water-soluble products for deeper penetration into the skin is known as hydration therapy. Often, moisturizers, which can contain various active ingredients such as occlusives and humectants, are used to modify the rate of water loss from the skin. The moisturizers are usually oil-in-water or water-in-oil emulsions, which can either be more cosmetically acceptable and less greasy or provide more moisturizing benefits and reduce water loss from the stratum corneum, respectively.
These treatments take advantage of the selective permeability of the epidermis to allow certain substances, including medications, to enter the bloodstream through the capillaries in the dermis. Properly formulated topical ointments or patches utilize this property to deliver active ingredients into the body. Furthermore, specialized treatments may include components that are proven to improve solubility, permeability, sustained release, and overcoming resistance, which can be especially beneficial in anti-aging products or medications.
While moisturizers mainly provide temporary hydration, certain anti-aging creams and other skin treatments incorporate ingredients that attempt to rehydrate the skin more deeply, reduce the appearance of wrinkles, and even stimulate skin growth. Some include collagen injections and BOTOX® injections, which have more invasive actions to rejuvenate the skin.