Only dermis is vascularized. Nutrients reach epidermis by diffusing through the tissue from the blood vessels. Underneath dermis is hypodermis (superficial fascia), also called subcutaneous tissue which is composed of loose connective tissue (mostly areolar and adipose).
A collagen dressing is a type of wound dressing that is made with a form of collagen to aid in the body's healing processes. Collagen is a category of structural proteins that are naturally present in almost every part of the human body and are especially common in connective tissue.
Skin Needling: Learn Everything About Collagen Induction Therapy. Skin needling involves using a tiny roller outfitted with fine needles, which are rolled back and forth over the skin several times. This treatment is typically used for improving the skin texture, tone, lines and wrinkles, scarring (such as acne scarring) and skin tightness.