Moxi is a non-ablative fractional laser that uses a 1927 nm thulium wavelength to target sun damage, uneven pigmentation, and early signs of aging without removing the skin’s surface. It works by delivering tiny columns of laser energy into the skin, creating microscopic zones of controlled heat damage that trigger your body’s natural repair process. The result is fresh, evenly toned skin with minimal downtime.
The Technology Behind Moxi
Moxi operates at a wavelength of 1927 nanometers, which falls in the thulium laser range. This specific wavelength has a strong affinity for water in the skin, meaning it’s absorbed efficiently by the water-rich cells in the upper layers. What makes Moxi “fractional” is that it doesn’t treat the entire skin surface at once. Instead, it delivers laser energy in a grid-like pattern, creating thousands of tiny micro-coagulation zones while leaving the surrounding tissue completely intact.
Each of these micro-columns is narrow enough that the untreated skin between them acts as a reservoir for healing. Your body recognizes the controlled damage and kicks off a wound-healing cascade: old, pigmented cells are pushed to the surface and shed, while fresh collagen and new skin cells are produced underneath. This is the core distinction between ablative and non-ablative lasers. Ablative lasers vaporize tissue. Moxi coagulates it, heating the tissue enough to trigger repair without actually removing the outer layer of skin.
What Moxi Treats
Moxi is FDA-cleared for coagulation of soft tissue, treatment of actinic keratosis (precancerous sun spots), and benign pigmented lesions like age spots, sun spots, and freckles. In practice, it’s used for a broader range of cosmetic concerns tied to sun exposure and early aging: uneven skin tone, mottled discoloration, rough texture, enlarged pores, and dull complexion.
The laser penetrates into the superficial dermis, where it can reach melanin deposits that sit deeper than what topical products typically address. This makes it particularly useful for early melasma-like unevenness, freckling from chronic sun exposure, and the kind of diffuse pigmentation that builds up over years of UV exposure. Moxi is also commonly described as a “prejuvenation” tool, meaning it’s used proactively by people who want to maintain their skin rather than wait until significant damage accumulates.
Why It’s Often Paired With BBL
You’ll frequently see Moxi combined with BroadBand Light (BBL) therapy in a single session, and there’s a specific reason for this. The two technologies target different layers of pigmentation. BBL uses a 515 nm filter that’s primarily absorbed by melanin sitting in the epidermis, the outermost layer of skin. Moxi’s fractionated channels penetrate deeper into the superficial dermis, where they generate enough heat to damage melanin-containing cells called dermal melanophages.
A study published in The Journal of Clinical and Aesthetic Dermatology found that while Moxi alone can improve brown spots, the improvement is significantly greater when the two are combined. In the study, patients received one to four passes of BBL followed by a high-energy Moxi treatment. Skin analysis scans showed a significant reduction in pigmentation across the group, with no adverse events reported. The BBL is always administered first, since Moxi causes redness that could interfere with the light-based treatment.
What the Treatment Feels Like
A typical Moxi session takes 8 to 10 minutes of actual laser time, not counting any preparation. Sciton, the company that manufactures the device, notes that topical numbing cream is only needed for more aggressive treatment settings. At lower intensities, most people tolerate the procedure without anesthesia. The sensation is often described as a prickling heat.
One of Moxi’s selling points is that it works across all skin types, including darker skin tones. Many laser treatments carry a risk of post-inflammatory hyperpigmentation in people with more melanin, but Moxi’s non-ablative approach and adjustable energy settings make it a safer option for a wider range of patients.
Recovery and the MENDS Process
The healing process after Moxi is driven by something called MENDS, which stands for microscopic epidermal necrotic debris. These are the damaged skin cells that the laser has targeted, and your body pushes them to the surface as part of its natural repair cycle. They appear as tiny bronzed specks on the skin, almost like a fine sandpaper texture or scattered dark dots.
This shedding process typically takes three to five days. During that window, your skin may look slightly rough or speckled. Once the MENDS flake off on their own, the skin underneath is noticeably smoother and more even in tone. Most people can return to normal activities quickly, though sun protection is critical during healing since the fresh skin is more vulnerable to UV damage.
How Many Sessions You’ll Need
The number of treatments depends heavily on what you’re trying to correct. For preventive care and early sun damage, one to two sessions per year is a reasonable maintenance schedule. If you’re dealing with mild photoaging and uneven tone, two to three sessions spaced four to six weeks apart is the typical starting series, followed by two maintenance sessions per year to sustain results.
More established concerns require more investment. Moderate photoaging, significant sun damage, and melasma typically call for three to four initial sessions at four- to six-week intervals. Fine lines and early skin laxity also fall into the three-to-four-session range, since the collagen remodeling that softens these concerns takes time to accumulate. Post-inflammatory hyperpigmentation varies: recent, superficial discoloration may respond in two to three sessions, while older, deeper pigmentation may need a full series of four.
After completing your initial series, maintenance sessions shift to every three to six months. The goal at that point transitions from building improvement to preserving it, so the treatments can be spaced more widely and still deliver lasting results.