Cold Plasma Sub-DCold Plasma Sub D represents the culmination of Dr. Perricone's research to date. A non invasive neck rejuvenation treatment with proven results, Cold Plasma Sub D firms and tightens the appearance of sagging skin along the chin, jawline and neck areas while minimizing visible wrinkles. Cold Plasma Sub D utilizes Dr. Perricone's unique delivery system and patented technology including DMAE to yield extraordinary results. With continued use, the neck