CO₂ Laser vs Ultherapy: Which Is Better for Skin Tightening?
Pro 1 Laser Team · October 23, 2026
As skin rejuvenation technology evolves, providers and patients alike are asking: which treatment offers better skin tightening, CO₂ laser or Ultherapy?
At Pro 1 Laser, we confidently stand behind the Alexa CO₂ Laser as a clinically superior choice for practices across North America seeking reliable, high-impact outcomes for non-surgical facial lifting and tightening.
The science: how each treatment works
Fractional ablative CO₂ laser
- Wavelength: 10,600 nm
- Absorbed by: the water in skin tissue
- Effect: coagulation plus ablation
The Alexa CO₂ Laser works by emitting light that is absorbed by water in the skin, creating micro-ablative columns and thermal coagulation zones. This triggers a wound-healing response that stimulates:
- Collagen remodeling
- Dermal thickening
- Visible tightening
Patients experience both immediate contraction and progressive lifting over 6-12 weeks after treatment.
Ultherapy (high-intensity focused ultrasound)
- Frequency: 4-7 MHz
- Target: SMAS and deep dermis
- Action: thermal coagulation only (no ablation)
Ultherapy delivers focused ultrasound below the skin to create heat-induced collagen stimulation, typically at 1.5-4.5 mm depth. It bypasses the epidermis, which means there’s no resurfacing, and visible results may take months to emerge. Efficacy also varies more between patients because of differences in skin density.
Why CO₂ beats Ultherapy for tightening
What the clinical data shows
Clinical studies show that fractional CO₂ laser treatments yield a 45-60% improvement in skin laxity and wrinkles, compared with 20-30% for ultrasound-based treatments.
Alexa’s system lets you adjust:
- Depth (superficial to deep dermis)
- Density (coverage)
- Power (up to 60 W with Alexa Pro MVP 7)
This flexibility ensures both predictable results and patient satisfaction.
Why practices across North America choose Alexa CO₂
Dermatologists, med spas and plastic surgeons in Canada and the U.S. are investing in the Alexa CO₂ Laser to offer:
- Dramatic tightening and texture improvement
- One device for skin, scars, warts and rejuvenation
- Resurfacing plus lifting in a single treatment
- FDA-cleared and Health Canada licensed technology
Alexa Femme™ adds women’s wellness and Alexa Follicle™ adds hair restoration, with fractional scanning up to 30 mm.
Frequently asked questions
For skin tightening, does CO₂ beat Ultherapy? Yes. CO₂ lasers like Alexa CO₂ deliver stronger and faster collagen remodeling thanks to both ablative and thermal effects. Ultherapy works only on deeper tissue and gives more gradual, less dramatic lifting.
How long does tightening from the Alexa CO₂ last? Typically 12-24 months for most patients, depending on age, skin quality and aftercare. Maintenance sessions may be recommended annually.
Can the Alexa CO₂ Laser treat other concerns beyond laxity? Absolutely. Alexa CO₂ is a versatile device that also addresses wrinkles, scars, texture, pigmentation and even medical concerns like warts or toenail fungus.
What is the downtime after a CO₂ laser treatment? Downtime is typically 3-7 days, depending on treatment intensity. Patients may experience redness, flaking or mild swelling that resolves within a week.
Want to see the Alexa CO₂ at work? Book a demo with Pro 1 Laser.
