Rejuvenation treatment is any medical or aesthetic procedure designed to reverse visible signs of aging or restore youthful function to skin and tissue. The term covers a wide spectrum, from injectable fillers and laser resurfacing to newer biological approaches like platelet-rich plasma and cellular therapies. What ties them together is a shared goal: stimulating the body’s own repair processes or replacing what time has taken away.
Why Skin Ages in the First Place
Understanding rejuvenation starts with understanding what it’s trying to undo. As you get older, your cells accumulate damage from sun exposure, oxidative stress, and the natural shortening of telomeres (protective caps on your DNA). Eventually, damaged cells enter a state called senescence, where they stop dividing but refuse to die. These “zombie cells” build up over time and release inflammatory signals that degrade the collagen and elastin keeping skin firm and elastic.
At the same time, your body produces less of the structural proteins and fat pads that give your face its shape. The result is a combination of surface-level changes (fine lines, uneven texture, dark spots) and deeper structural shifts (hollowing around the eyes, sagging along the jawline, thinning lips). Different rejuvenation treatments target different layers of this problem.
Injectables: Fillers and Neurotoxins
The most common rejuvenation treatments are injectables, and they fall into two broad categories. Neurotoxins (like Botox) temporarily relax the muscles that create expression lines, particularly across the forehead and around the eyes. The effect typically lasts three to four months before the muscle activity gradually returns.
Dermal fillers take a different approach. Hyaluronic acid fillers work by absorbing water at the injection site, physically restoring lost volume. They can smooth nasolabial folds, plump lips, and sharpen the jawline, with results lasting roughly 6 to 18 months depending on the product and location. Other fillers use materials like calcium hydroxyapatite or poly-L-lactic acid, which stimulate your body to produce new collagen over a period of about three months. These biostimulatory fillers tend to produce more gradual, longer-lasting results.
Clinicians often combine both approaches. A high-firmness filler placed deep along the jawline or chin provides structural support, while a softer product smooths surface wrinkles. Neurotoxin can be layered in to relax surrounding muscles so the filler lasts longer and looks more natural.
Laser and Energy-Based Resurfacing
Laser rejuvenation works by creating controlled damage to the skin’s surface, which triggers the body’s wound-healing response and stimulates new collagen production in the deeper layers. The CO2 laser, introduced in the early 1990s, remains one of the most effective options. It vaporizes the outermost layer of skin cleanly, leaving a zone of heat-treated tissue underneath that jumpstarts collagen remodeling as it heals.
Ablative lasers like CO2 produce the most dramatic results, with improvements lasting two to five years. The trade-off is a longer recovery period, sometimes a week or more of redness and peeling. Non-ablative lasers work beneath the skin’s surface without removing it, meaning less downtime but more modest results that last six months to two years. Most people need one to two maintenance sessions per year to sustain non-ablative results. Research shows that 88% of patients treated with ablative lasers still report noticeable improvement at the two-and-a-half-year mark.
Radiofrequency microneedling is a newer energy-based option that combines tiny needles with heat energy to tighten skin and improve texture. These are FDA-cleared Class II medical devices, but the FDA has flagged reports of serious complications including burns, scarring, fat loss, and nerve damage when devices are used improperly. These procedures should only be performed by licensed, experienced providers.
Platelet-Rich Plasma (PRP)
PRP therapy uses your own blood. A small sample is drawn, spun in a centrifuge to concentrate the platelets, then injected back into the skin. Those platelets release a cocktail of growth factors that recruit new cells, promote collagen production, and improve blood flow to the treated area.
Results build gradually. In clinical studies, patients saw measurable improvement in nasolabial fold wrinkles after eight weeks, with 14 out of 17 treated folds improving by more than 25%. Skin firmness, pigmentation, and overall appearance continued to improve over the following months. By six months, patients in one study reported average satisfaction scores above 90%. Redness in treated areas took roughly five to six months to fully resolve, and improvements in skin density (visible on ultrasound) appeared as early as two months after the first injection.
PRP is often combined with microneedling or laser treatments to enhance results. Because it uses your own blood, allergic reactions are essentially nonexistent.
Exosome Therapy
One of the newer entries in rejuvenation is exosome therapy. Exosomes are tiny particles naturally released by cells that carry proteins, fats, and genetic material capable of influencing how neighboring cells behave. When exosomes are harvested from stem cells, they tend to carry anti-inflammatory and regenerative signals.
Applied topically after procedures like microneedling, exosome products have shown improvements in skin hydration, elasticity, wrinkles, pore size, and pigmentation in the short term. In split-face trials comparing exosomes to PRP after radiofrequency microneedling, both sides showed similar overall improvement. The exosome side showed a slight edge in wrinkling and texture, while overall appearance was comparable. Both approaches increased collagen production over time with no significant adverse events, just the expected brief redness and mild swelling that resolved within a week.
The appeal of exosomes is that they offer regenerative benefits without using live cells, which simplifies safety concerns. However, the FDA has not broadly approved injectable exosome products, and most current evidence supports topical use alongside other procedures rather than standalone injection.
NAD+ and Cellular Rejuvenation
Beyond skin-deep treatments, a growing category of rejuvenation targets aging at the cellular level. NAD+ is a molecule your cells need to produce energy and repair DNA, and its levels decline significantly with age. Intravenous NAD+ infusions have become popular at longevity clinics, with proponents claiming benefits for energy, cognition, and overall vitality.
The reality is more cautious. Small studies in healthy and elderly participants have shown that IV infusions do raise NAD+ levels in the blood, and there are minor trends toward cognitive improvement. But these trials involved small groups and short testing periods. Researchers have been clear that current evidence is too inconclusive to directly link increased NAD+ levels to established health benefits in humans. Oral supplements using NAD+ precursors are more widely available and similarly early in their evidence base.
How Long Results Last
Duration varies enormously by treatment type. Here’s a practical comparison:
- Neurotoxins (Botox): 3 to 4 months per session
- Hyaluronic acid fillers: 6 to 18 months, depending on product and placement
- Biostimulatory fillers: 1 to 2 years or more, since they trigger your own collagen growth
- Ablative laser resurfacing: 2 to 5 years with proper sun protection, optional touch-ups every 2 to 3 years
- Non-ablative lasers: 6 months to 2 years, typically requiring yearly maintenance
- PRP: Improvements build over 2 to 6 months, with results generally maintained for about a year before repeat sessions are needed
No rejuvenation treatment stops the aging process permanently. Your skin continues to lose collagen, your facial fat pads continue to shift, and environmental damage accumulates. Most people who pursue rejuvenation treatments develop a maintenance schedule, combining different approaches at different intervals to address both surface texture and deeper structural changes over time.