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Now at Lean Lab · Pasadena, CA
XERF Structural
Skin Tightening
The world's first multifrequency monopolar RF treatment.
No needles. No numbing. No downtime.
Tighten loose skin on the face, neck, abdomen, arms, and thighs — including after GLP-1 weight loss on semaglutide or tirzepatide.
XERF™ is here.
Book your session today.
Structural skin tightening for face, neck, jawline, and body — no needles, no surgery, no downtime. Now available at Lean Lab in Pasadena. Two sessions are recommended for optimal results.
Book a SessionSingle Session
$2,499
Face, neck & body
2-Session Package
$4,500
Save $498 vs. single sessions
2 sessions recommended for optimal results
What Is XERF?
Structural Tightening at Every Layer
XERF™ is a breakthrough in non-invasive skin tightening. Unlike conventional RF treatments that deliver energy at a single depth, XERF™ combines 6.78 MHz and 2 MHz frequencies to reach the shallow, middle, and deep layers of the skin — including the SMAS, the same foundational layer targeted in surgical facelifts.
The result: real structural change. Collagen bundles thicken and tighten at multiple tissue depths, producing smoother, firmer, more lifted skin — on the face and the body — with zero recovery time.
Treatment Areas
Face, Neck & Full Body Tightening
XERF™ is one of the few non-invasive treatments that delivers meaningful results on both the face and the body — including areas commonly affected by GLP-1 weight loss.
Face
Neck & Décolletage
Body — GLP-1 Patients
GLP-1 PatientsHow XERF Compares
XERF vs Other Skin Tightening Treatments
XERF™ is the only treatment combining multi-depth RF energy with zero needles and zero downtime.
The Science
How XERF Works
Four proprietary technologies work together to deliver precise, comfortable, and effective skin tightening at every depth.
Multifrequency RF (6.78 MHz + 2 MHz)
The only treatment combining two RF frequencies in one session. The higher 6.78 MHz frequency targets superficial dermal layers; the lower 2 MHz frequency penetrates deeper — reaching the SMAS for structural lifting. This dual-depth approach produces more comprehensive collagen remodeling than any single-frequency RF device.
Advanced Integrated Cryogen Delivery
Real-time surface cooling protects the epidermis while RF energy heats deeper tissue. This allows higher therapeutic temperatures at depth — maximizing collagen stimulation — without discomfort at the surface. No numbing cream needed.
Accurate Impedance Feedback
The XERF™ system reads your skin's unique electrical properties in real time, automatically adjusting energy delivery for a truly personalized treatment. This is especially important for body treatments where tissue composition varies significantly between patients.
Wave Fit Pulse Technology
Precisely shaped RF pulses maximize collagen stimulation while minimizing thermal spread. Three depth settings and ten intensity levels allow complete customization for any skin type, concern, or body area — from delicate facial tissue to thicker abdominal skin.
Preparation & Aftercare
What to Expect Before, During & After
Following these guidelines helps ensure the most comfortable treatment and the best possible results.
Before Your Treatment
Hydrate well
Drink at least 3 liters of water every day for the 3 days leading up to your appointment. Arriving well-hydrated makes the treatment more comfortable and improves energy delivery.
Pause strong actives
Avoid retinoids, exfoliating acids (AHAs/BHAs), and other strong skincare actives for 72 hours before your session unless your provider advises otherwise.
Arrive clean
Remove all metal jewelry and makeup from the treatment area before your session. Arrive with clean, product-free skin.
No numbing needed
You do not need to apply numbing cream before your appointment. XERF™'s built-in cooling technology keeps the treatment comfortable throughout.
During Your Treatment
Treatment time
Sessions typically take 30–60 minutes depending on the treatment area.
What you'll feel
A deep, even warmth combined with cooling at the surface. Most patients describe it as a warm stone massage on the face. Some areas may feel more intense — this is normal.
No numbing required
XERF™'s Never-Numb technology means no injections, no topical anesthetic, and no waiting. You can relax comfortably throughout the entire session.
Fully customized
Your provider adjusts depth settings and intensity levels in real time based on your skin's response, ensuring a safe and effective treatment every session.
After Your Treatment
Zero downtime
You can return to your normal activities immediately. Mild pinkness or warmth in the treated area may appear but typically fades within minutes to a few hours.
Resume skincare same day
You can resume your normal skincare routine the same day unless your provider advises otherwise. Gentle, hydrating products are ideal for the first 24 hours.
Wear SPF daily
Apply SPF 30 or higher every day to protect your results and maintain the integrity of the treated skin. Sun protection is essential for long-lasting outcomes.
Results build over time
Some patients notice immediate tightening. Full collagen remodeling develops over 3–6 months. Results continue to improve with each session and can last 6 months or more.
Your Journey
Your XERF Experience at Lean Lab
01
Consultation
Your provider assesses your skin laxity, goals, and medical history — including your GLP-1 weight loss history if applicable. A personalized treatment plan is created with the number of sessions, depth settings, and intensity levels tailored to your skin and treatment areas.
02
Treatment Session
Sessions take 30–60 minutes depending on the treatment area. The XERF™ handpiece glides over the skin delivering comfortable warmth. No numbing, no needles — most patients describe it as a warm massage.
03
Results & Follow-Up
Some patients notice immediate tightening. Full collagen remodeling develops over 2–3 months. Most patients complete 2 face sessions for optimal results, with maintenance treatments every 6–12 months.
Is XERF Right for You?
Ideal Candidates for XERF
XERF™ is a great fit for patients who want visible skin tightening without surgery, needles, or recovery time — on the face or the body.
For GLP-1 Patients
Lost Weight on Semaglutide or Tirzepatide?
Tighten What's Left Behind.
GLP-1 medications like semaglutide (Ozempic, Wegovy) and tirzepatide (Mounjaro, Zepbound) — and Retatrutide — are incredibly effective for weight loss. But rapid fat loss often leaves behind loose, crepey, or sagging skin on the abdomen, arms, thighs, and flanks that diet and exercise alone can't fix.
XERF™ is one of the most powerful non-surgical tools available to address this. Its multifrequency RF energy heats the deep dermis and subcutaneous tissue, triggering new collagen and elastin production that physically tightens and firms the skin from the inside out — no surgery, no scars, no recovery.
Abdomen
Loose belly skin is the most common concern after GLP-1 weight loss. XERF™ tightens the deep dermal and subcutaneous layers of the abdominal skin, reducing laxity and improving contour.
Arms
Upper arm skin laxity ("bat wings") responds well to XERF™ body treatments. RF energy stimulates collagen remodeling in the deep dermis, firming and tightening the inner arm without surgery.
Thighs
Inner and outer thigh skin laxity is common after significant weight loss. XERF™ delivers targeted RF energy to tighten loose thigh skin and improve overall leg contour.
Flanks & Knees
Loose skin on the flanks, love handles, and around the knees can be addressed with XERF™ body treatments, producing visible tightening over a series of sessions.
Combine & Save
Pair XERF with Your GLP-1 Weight Loss Program
Lean Lab offers GLP-1 medications (semaglutide, tirzepatide, and retatrutide) alongside XERF body tightening — so you can address weight loss and skin laxity in one place. Ask about our combination program pricing.
Serving Pasadena & the San Gabriel Valley
XERF Skin Tightening
in Pasadena, CA
Lean Lab is located at 238 S Arroyo Pkwy, Pasadena, CA 91105 — just minutes from Old Town Pasadena, South Pasadena, San Marino, Arcadia, and Monrovia. We are one of the only medical clinics in the Pasadena area offering XERF™ structural skin tightening.
Patients travel to us from across the San Gabriel Valley and greater Los Angeles County — including Glendale, Alhambra, Temple City, Sierra Madre, La Cañada Flintridge, Duarte, Azusa, Glendora, Covina, West Covina, El Monte, Rosemead, San Gabriel, and Downtown Los Angeles — for XERF face, neck, and body treatments combined with our medically supervised GLP-1 weight loss programs.
Whether you're searching for non-invasive skin tightening near Pasadena, XERF treatment in the San Gabriel Valley, or loose skin treatment after GLP-1 weight loss in Los Angeles — Lean Lab is your destination.
Areas We Serve
FAQ
XERF Questions Answered
Learn More
XERF Resources & Guides
Everything you need to know about XERF — from how it works to what to expect after GLP-1 weight loss.
Ready to Get Started?
Book Your XERF Consultation at Lean Lab
Presale pricing available now — $1,950/session (reg. $2,500). Save $550 per session, $1,100 on the recommended 2-session series.
Located in Pasadena, CA — serving the San Gabriel Valley and greater Los Angeles area. Same-week appointments often available.