The process of producing beneficial changes.(noun)
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Use "rejuvenation" in a sentence
"Now, after years of research, rejuvenation is possible."
"Guests could sign up for appointments to try out both the Arasys Effortless Power Workout, which speeds up muscle building and inch loss at a fraction of the time you would spend at the gym, and Nano Perfector, a non-invasive skin rejuvenation computerized device that builds new tissue, lifts sagging muscles, purifies and detoxifies until your skin glows with health."
"LED photo rejuvenation is not to be confused with laser therapy."