Face slimming Botox, specifically masseter reduction, represents one of the most popular non-surgical facial contouring procedures available today. This article explores how strategic Botox injections can transform a square jawline into a more tapered, V-shaped appearance while addressing functional concerns like teeth grinding and jaw clenching. Our free calculator helps determine your personalized Botox units requirement based on individual anatomical factors and treatment goals.
In this definitive guide, you’ll discover:
• The science behind masseter Botox and how it creates facial slimming
• Step-by-step procedure details from consultation to recovery
• How to calculate your ideal Botox units using our specialized calculator
• Pre-treatment preparation and post-care instructions for optimal results
• Cost analysis and comparison with alternative treatments
• Realistic expectations and potential side effects to consider
• Maintenance strategies for long-term facial contouring success
• Latest advancements in masseter reduction techniques
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Table Of Contents
What Exactly Is Masseter Botox and How Does It Create Facial Slimming?
Masseter Botox involves precisely injecting botulinum toxin type A into the masseter muscles, which are the primary chewing muscles located at the angles of your jaw. When these muscles become overdeveloped due to genetics, teeth grinding, or excessive chewing, they create a wide, square-shaped jawline. Botox works by temporarily blocking nerve signals to these muscles, causing them to relax and gradually reduce in size through a process called disuse atrophy.
The masseter muscle reduction process follows a predictable timeline. Within the first two weeks, patients typically notice decreased jaw tension and reduced teeth grinding. Visible slimming becomes apparent around 4-6 weeks as the muscle volume decreases, with peak results occurring at 2-3 months. The treatment doesn't affect bone structure but creates the illusion of a more contoured jawline by softening the muscular angles.
Key benefits of masseter Botox extend beyond aesthetics. Most patients experience significant relief from bruxism symptoms, including morning jaw soreness, tooth damage, and tension headaches. The dual functional and cosmetic benefits make this treatment uniquely valuable compared to other facial contouring procedures.
Who Is the Ideal Candidate for Masseter Reduction Botox Treatment?
Determining candidacy for masseter Botox requires evaluating both cosmetic concerns and functional symptoms. The ideal candidate typically presents with a square jawline caused by hypertrophic masseter muscles rather than bone structure. During consultation, practitioners assess muscle bulk by asking patients to clench their teeth while palpating the masseter area.
Common indicators of masseter hypertrophy include:
• A wide, square facial shape that lacks tapering at the jawline
• Visible bulging of jaw muscles when teeth are clenched
• History of teeth grinding or jaw clenching during sleep
• Jaw pain or fatigue after chewing
• Uneven jawline due to asymmetrical muscle development
• Desire for non-surgical facial contouring without downtime
Medical contraindications include pregnancy, breastfeeding, neuromuscular disorders, and allergies to botulinum toxin components. Patients with significant jawbone prominence may achieve less dramatic results, as Botox only addresses muscular contribution to facial width. Our calculator helps assess suitability by evaluating muscle mass, desired slimming level, and anatomical factors.
How Does the Masseter Botox Procedure Work From Consultation to Completion?
The masseter reduction journey begins with a comprehensive consultation where practitioners evaluate facial structure, muscle mass, and treatment goals. Using our calculator beforehand helps patients understand potential unit requirements and outcomes. The actual procedure takes approximately 15-30 minutes, making it an convenient lunchtime treatment.
Step-by-step procedure breakdown:
- Pre-treatment assessment: Photographs from multiple angles, muscle measurement, and discussion of expectations
- Marking injection points: The practitioner identifies the thickest portion of each masseter muscle while the patient clenches
- Cleaning the area: Alcohol swabs disinfect the injection sites to prevent infection
- Botox injection: Using ultra-fine needles, the practitioner administers multiple small injections into each masseter muscle
- Post-treatment instructions: Patients receive guidance on aftercare to optimize results
Most patients describe the sensation as quick pinpricks with minimal discomfort. Some practitioners use ice packs before injecting to numb the area, though anesthesia isn't typically required. The strategic injection pattern ensures even distribution throughout the muscle while avoiding important surrounding structures like facial nerves and salivary glands.
What Is the Science Behind Botox for Masseter Reduction?

Botox contains botulinum toxin type A, which works by blocking the release of acetylcholine at the neuromuscular junction. This neurotransmitter normally signals muscles to contract. By inhibiting this communication, Botox creates temporary chemical denervation that relaxes the targeted muscles.
The masseter muscle undergoes specific changes after Botox treatment:
• Week 1-2: Neural blockade begins, reducing involuntary clenching and grinding
• Week 3-4: Muscle activity decreases by approximately 40%, starting the atrophy process
• Month 2-3: Maximum muscle volume reduction occurs, creating visible contour changes
• Month 4-6: Gradual return of muscle function begins as new nerve endings form
Muscle atrophy occurs because reduced activity decreases protein synthesis and increases protein breakdown within muscle fibers. This process is completely reversible, which is why maintenance treatments are necessary. The masseter muscle typically returns to its original size within 6-12 months after treatment cessation.
Recent studies using ultrasound imaging confirm that masseter volume reduction averages 20-30% after Botox treatment, with greater reduction in patients with larger initial muscle mass. The cosmetic improvement correlates directly with this decrease in muscular bulk rather than any effect on jawbone or fat tissue.
How Much Botox Is Typically Needed for Masseter Reduction?
The required Botox units vary significantly based on individual factors like muscle mass, gender, and treatment goals. Our calculator incorporates these variables to provide personalized recommendations, but general guidelines exist for initial treatment planning.
Standard dosing ranges for masseter Botox:
• Mild slimming (minimal muscle bulk): 15-25 units per side
• Moderate slimming (average muscle development): 25-35 units per side
• Significant reduction (well-developed muscles): 35-50 units per side
• Therapeutic treatment (for bruxism): 15-25 units per side
Gender differences significantly impact dosing. Men typically have 30-50% larger masseter muscles than women and often require higher doses. The calculator accounts for this through gender-specific algorithms. Previous Botox experience also influences dosing, with experienced patients sometimes requiring lower maintenance doses due to muscle memory effects.
Practitioners typically start with conservative doses during initial treatments, especially for therapeutic bruxism management. They can always administer additional units after 2-3 weeks if needed, but cannot reverse overdosing. Our calculator provides a safe starting range based on your specific characteristics and desired outcome.
What Results Can You Realistically Expect From Masseter Botox?
Managing expectations is crucial for patient satisfaction with masseter Botox. While dramatic transformations are possible, understanding the timeline and extent of changes prevents disappointment. The calculator helps visualize potential outcomes based on your inputs.
Realistic result timeline:
• Days 1-7: Reduced jaw tension and teeth grinding, but no visible slimming
• Weeks 2-4: Initial softening of jawline angles, decreased morning jaw soreness
• Weeks 4-8: Noticeable slimming as muscle volume decreases by 20-30%
• Months 2-3: Peak results with maximum jawline contouring
• Months 4-6: Gradual return of muscle function, maintenance recommended
The degree of improvement depends on your starting point. Patients with predominantly muscular jaw widening achieve more dramatic results than those with bony prominence. Most patients achieve a 10-15% reduction in facial width measurement, creating a more oval or heart-shaped facial contour.
Non-cosmetic benefits often include:
• Reduced frequency and intensity of teeth grinding
• Decreased jaw pain and tension headaches
• Improved sleep quality due to reduced clenching
• Prevention of tooth wear and TMJ strain
• Enhanced facial symmetry in cases of muscular imbalance

What Are the Potential Side Effects and Risks of Masseter Botox?
While generally safe when administered by experienced practitioners, masseter Botox carries potential side effects that patients should understand before treatment. Most reactions are mild and temporary, resolving within days to weeks.
Common temporary side effects:
• Injection site redness, swelling, or bruising
• Mild jaw soreness or tenderness when chewing
• Temporary asymmetry if dosing uneven between sides
• Headache during the first 24-48 hours
• Temporary smile changes if diffusion affects nearby muscles
Rare but more significant risks:
• Difficulty chewing tough foods if excessive weakening occurs
• Sunken appearance if too much volume loss in patients with minimal facial fat
• Bulging of parotid gland if adjacent tissue affected
• Allergic reaction to Botox components
• Development of antibodies with repeated use, reducing effectiveness
Risk minimization strategies include choosing experienced injectors, starting with conservative doses, and avoiding blood thinners before treatment. Our calculator helps prevent overdosing by providing appropriate unit ranges based on your muscle characteristics. Patients with specific concerns should discuss them during consultation.
How Does Recovery and Aftercare Impact Masseter Botox Results?
Proper aftercare significantly influences treatment outcomes and complication risks. While masseter Botox requires minimal downtime, specific precautions during the first 24-48 hours optimize results by ensuring the product remains in the targeted muscles.
Essential post-treatment instructions:
• Avoid rubbing or massaging the treated area for 24 hours
• Remain upright for 4 hours after injections
• Refrain from strenuous exercise for 24 hours
• Avoid facials, saunas, or steam rooms for 48 hours
• Skip alcohol for 24 hours to minimize bruising
• Chew normally but avoid excessive gum chewing initially
Patients can immediately resume most normal activities, including work and light exercise. Some practitioners recommend conscious jaw exercises like repeated clenching and relaxing during the first few hours to help distribute the product, though evidence for this practice is mixed.
Follow-up appointments at 2-3 weeks allow assessment of initial results and possible touch-ups if needed. Patients should document their progress with photographs to objectively evaluate changes over time. Our calculator includes a tracking feature to monitor your response to treatment for future reference.
How Long Do Masseter Botox Results Last and What Maintenance Is Required?
The duration of masseter Botox results varies based on individual metabolism, activity level, and injection technique. Most patients enjoy visible slimming for 4-6 months before gradual return of muscle bulk begins. With repeated treatments, some patients experience slightly longer duration due to muscle memory effects.
Factors influencing result longevity:
• Metabolic rate: Faster metabolisms may process Botox more quickly
• Muscle activity: Heavy chewers or grinders may see shorter duration
• Injection precision: Proper intramuscular placement extends effectiveness
• Dosage adequacy: Sufficient units prevent early recurrence
• Previous treatments: Sometimes extends duration due to muscle atrophy
Maintenance typically involves follow-up treatments every 4-6 months once the muscle returns to approximately 80% of its original size. Some patients choose lighter maintenance dosing (approximately 70% of initial units) once their desired contour is achieved. Our calculator provides both initial and maintenance dosing recommendations.
Long-term considerations include potential permanent reduction in muscle bulk after several years of consistent treatment. However, complete regression occurs if treatments are discontinued, so ongoing maintenance is necessary for sustained results. Budgeting for 2-3 treatments annually ensures consistent facial contour.
How Does Masseter Botox Compare to Other Jaw Slimming Procedures?
Understanding alternative and complementary treatments helps patients make informed decisions about their facial contouring journey. Masseter Botox occupies a unique position between non-invasive treatments like Kybella and surgical options like jaw reduction surgery.
Comparison of jaw slimming procedures:
• Masseter Botox: Reduces muscle bulk, minimal downtime, temporary results, moderate cost
• Kybella: Reduces submental fat, multiple sessions needed, permanent fat destruction, moderate cost
• Buccal fat removal: Reduces cheek fat pads, surgical procedure, permanent results, higher cost
• Jawline filler: Enhances definition rather than reducing width, temporary results, moderate cost
• Masseter reduction surgery: Removes muscle and/or bone, permanent results, significant cost and downtime
Many patients combine procedures for enhanced results. Common combinations include masseter Botox with chin filler for better proportion, or with buccal fat removal for comprehensive contouring. Our calculator can adjust recommendations for patients planning combination treatments.
Cost comparison reveals that while masseter Botox requires ongoing investment, the cumulative cost over several years typically remains lower than surgical options. The non-permanent nature also allows for adjustment as facial aging occurs, providing flexibility that permanent procedures lack.

What Factors Influence the Cost of Masseter Botox Treatments?
The financial investment in masseter Botox varies based on geographic location, practitioner expertise, and specific patient factors. Understanding cost components helps patients budget appropriately and avoid unexpected expenses.
Primary cost factors:
• Geographic location: Major metropolitan areas typically command higher prices
• Practitioner credentials: Dermatologists and plastic surgeons often charge more than medi-spas
• Botox brand: Different neurotoxins (Botox, Dysport, Xeomin) have varying costs
• Units required: Higher muscle mass necessitates more units, increasing cost
• Clinic prestige: High-end facilities with luxurious amenities charge premium prices
Average cost ranges in the United States:
• Per unit pricing: $10-$20 per unit, with masseter treatments typically requiring 30-100 total units
• Per treatment session: $300-$1,200 depending on units required
• Annual maintenance: $600-$2,400 for 2-3 treatments per year
Many practices offer package pricing for multiple treatments or combination procedures. Membership programs sometimes provide discounts for loyal patients. Our calculator includes a cost estimation feature based on your required units and local average pricing.
Insurance coverage is typically unavailable for cosmetic masseter Botox, but some plans may cover portion of the cost when treating documented bruxism or TMJ disorders. Patients should verify coverage with their provider and obtain appropriate documentation from their practitioner.
How to Choose the Right Practitioner for Masseter Botox Injections?
Selecting a qualified injector is the most important factor in achieving safe, satisfying masseter Botox results. While many providers offer Botox injections, specific experience with masseter reduction ensures understanding of the unique considerations involved.
Practitioner qualification hierarchy:
• Board-certified dermatologists or plastic surgeons: Highest level of training, understand facial anatomy comprehensively
• ENT or maxillofacial surgeons: Specialized knowledge of jaw anatomy and function
• Experienced nurse injectors: Often skilled technically, working under physician supervision
• Dentists with Botox training: Understand occlusal relationships and bruxism management
• Medi-spa technicians: Variable training, may lack depth of anatomical knowledge
Essential questions to ask potential providers:
• How many masseter Botox treatments do you perform monthly?
• Can you show before/after photos of actual patients?
• What is your approach to dosing calculation?
• How do you manage complications or unsatisfactory results?
• What is included in the follow-up protocol?
Red flags include providers who cannot explain their technique clearly, offer significantly lower pricing than competitors, or pressure patients into unnecessary additional treatments. Our calculator helps patients understand appropriate dosing so they can recognize potentially unsafe recommendations.
What Pre-Treatment Preparation Optimizes Masseter Botox Results?
Proper preparation enhances both safety and outcomes while minimizing potential side effects. Following specific guidelines during the weeks before treatment creates optimal conditions for successful results.
Pre-treatment preparation timeline:
• 2-4 weeks before: Schedule consultation, discuss medications with provider, begin arnica if prone to bruising
• 1-2 weeks before: Avoid blood thinners like aspirin, ibuprofen, and supplements like fish oil or vitamin E
• 3-5 days before: Increase hydration, avoid excessive alcohol consumption
• 24 hours before: Clean skin thoroughly, avoid heavy makeup on treatment day
• Day of treatment: Eat normally, arrive without jaw makeup, wear comfortable clothing
Medications and supplements to discontinue (with physician approval):
• Prescription blood thinners (warfarin, etc.)
• NSAIDs (ibuprofen, naproxen)
• Aspirin and aspirin-containing products
• Vitamin E, fish oil, omega-3 supplements
• Ginkgo biloba, garlic supplements, ginseng
• St. John's Wort, evening primrose oil
Patients should arrive with clean skin and prepared to discuss their goals and concerns. Bringing photographs of desired jawline shapes helps communicate expectations clearly. Our calculator provides a pre-treatment checklist to ensure thorough preparation.

What Are the Latest Advancements in Masseter Reduction Techniques?
The field of masseter Botox continues evolving with improved techniques and technologies that enhance precision, safety, and outcomes. Staying informed about these developments helps patients access the most advanced treatment options.
Recent technical innovations:
• Ultrasound-guided injections: Real-time imaging ensures precise intramuscular placement
• EMG-assisted injections: Electromyography identifies the most active muscle regions
• Micro-droplet technique: Multiple tiny injections instead of few larger ones for even distribution
• Combination protocols: Strategic pairing with other treatments for enhanced contouring
• Customized dosing algorithms: Software-assisted calculation based on 3D facial scanning
Emerging research directions include:
• Extended-release formulations that may provide longer duration
• Muscle-specific neurotoxins with potentially fewer side effects
• Genetic factors influencing treatment response and duration
• Objective measurement tools for standardized outcome assessment
• Preventative applications for patients at risk of severe bruxism damage
Our calculator incorporates the latest evidence-based dosing guidelines while acknowledging that individual response varies. The field continues to move toward increasingly personalized treatment approaches based on specific facial anatomy and muscle characteristics.
How Does Masseter Botox Impact Dental Health and Occlusion?
The relationship between masseter Botox and dental health represents an important consideration often overlooked in purely cosmetic discussions. The masseter muscles play crucial roles in chewing function and jaw positioning, requiring careful treatment planning to maintain oral health.
Positive dental impacts include:
• Reduced grinding forces that damage tooth enamel
• Decreased pressure on TMJ structures
• Prevention of tooth fractures and abfraction lesions
• Reduced muscle hyperactivity that contributes to malocclusion
• Relief from myofascial pain dysfunction syndrome
Potential considerations require monitoring:
• Changes in chewing efficiency, particularly during initial adaptation
• Possible subtle shifts in bite perception as muscle balance changes
• Need for occlusal adjustment in some patients with significant reduction
• Coordination with dental professionals for patients undergoing orthodontic treatment
Patients with existing dental concerns should inform both their dentist and Botox provider to ensure coordinated care. Our calculator includes questions about dental history to help identify patients who might benefit from dental consultation before treatment.
Can Masseter Botox Help with TMJ Disorders and Bruxism?
Therapeutic applications of masseter Botox extend beyond cosmetic improvement to meaningful symptom relief for patients suffering from temporomandibular joint disorders and sleep bruxism. The muscle-relaxing effects directly address the excessive forces that drive these conditions.
Bruxism management benefits:
• Reduced intensity and frequency of grinding episodes
• Decreased morning jaw soreness and fatigue
• Prevention of tooth wear and damage
• Improved sleep quality for patients and partners
• Headache reduction through decreased muscle tension
TMJ disorder applications:
• Pain reduction in myogenous TMJ disorders (muscle-based)
• Decreased joint loading in arthrogenous conditions
• Breaking cycles of muscle spasm and pain
• Complementary treatment alongside dental splints and physical therapy
Therapeutic dosing typically ranges from 15-25 units per side, lower than purely cosmetic applications. Treatment intervals may be longer (6-9 months) as symptoms rather than appearance guide retreatment timing. Our calculator includes a therapeutic mode for patients primarily seeking functional improvement.
Documentation for insurance purposes requires specific diagnosis coding and sometimes pre-authorization. Patients should discuss insurance possibilities during consultation and obtain detailed receipts with appropriate medical codes.
What Role Does Gender Play in Masseter Botox Treatment Planning?
Biological sex significantly influences masseter muscle anatomy, requiring different treatment approaches for male and female patients. Understanding these differences ensures natural-looking results that harmonize with overall facial structure.
Key gender differences in masseter anatomy:
• Muscle volume: Male masseters average 30-50% larger cross-sectional area
• Facial structure: Male jawbones typically wider, requiring different aesthetic goals
• Hormonal factors: Androgens promote muscle hypertrophy in males
• Aesthetic ideals: Masculine jaws often maintain some angularity versus feminine preference for softer contours
Male-specific considerations:
• Higher initial dosing typically required (often 35-50 units per side)
• Maintenance of some jaw definition to preserve masculine appearance
• Possible combination with jawline filler to enhance definition while reducing width
• Attention to possible beard pattern changes with significant muscle reduction
Female-specific considerations:
• Generally lower dosing (25-35 units per side for significant reduction)
• Creation of oval or heart-shaped facial contour as primary goal
• Possible combination with cheek filler to enhance feminine lifting effect
• Careful assessment of lower face volume to prevent aged appearance
Our calculator incorporates gender as a primary variable in dosing recommendations, with separate algorithms for male and female patients. This ensures appropriate unit suggestions based on typical anatomical differences.
How Does Age Affect Masseter Botox Treatment and Results?
Age influences masseter Botox outcomes through changes in facial anatomy, skin elasticity, and muscle characteristics. Treatment planning must account for these age-related factors to achieve natural-looking results that harmonize with overall facial aging patterns.
Age-specific considerations:
• 20s-30s: Primarily muscular concerns, good skin elasticity, dramatic slimming possible
• 40s-50s: Beginning facial volume loss, may need conservative dosing to prevent hollowing
• 60s+: Significant volume deflation, often better candidates for filler than Botox alone
Younger patients typically present with well-defined masseter muscles and good skin elasticity, allowing for significant reduction without concern for sagging. Older patients may experience jowl formation or marionette line accentuation if excessive jaw volume is removed, as the skin has less ability to redrape tightly.
Combination approaches often benefit mature patients:
• Conservative masseter Botox combined with jawline filler for support
• Lower face thread lifts to counteract potential sagging
• Skin tightening procedures to enhance contouring effects
• Cheek filler to restore volume and provide lifting support
Our calculator includes age as a factor in dosing recommendations, suggesting more conservative approaches for patients over 50 to prevent undesirable side effects. The goal shifts from dramatic slimming to graceful contouring in mature patients.
What Are the Global Trends in Masseter Botox and Facial Contouring?
Masseter reduction reflects broader aesthetic trends that vary across cultures and regions. Understanding these global patterns helps contextualize treatment goals and technique variations practiced worldwide.
Regional preference differences:
• East Asia: Strong preference for V-line jaw, often combined with other procedures
• Western countries: More balanced approach maintaining some jaw definition
• Middle East: Often conservative reduction preserving facial structure
• South America: Frequently combined with chin augmentation for balance
The "Korean V-line" represents the most dramatic approach to jaw reduction, often involving both Botox and surgical procedures to create sharply tapered jawlines. Western trends generally favor more natural contours that maintain individual character while softening angles.
Emerging global trends include:
• Gender-fluid approaches that blend masculine and feminine ideals
• Ethnicity-specific techniques that preserve cultural features
• Minimally invasive combination protocols for comprehensive reshaping
• Preventative applications in younger patients to influence facial development
• Focus on functional improvement alongside aesthetic enhancement
Our calculator allows for customization based on aesthetic preferences, with different outcome settings for natural versus dramatic results. This flexibility accommodates varying beauty standards across different cultural contexts.
How to Use the Face Slimming Botox Calculator for Optimal Results?
Our specialized calculator incorporates multiple variables to provide personalized dosing recommendations for masseter Botox. Understanding how to input accurate information ensures the most useful output for your treatment planning.
Step-by-step calculator guide:
- Demographic information: Enter age, gender, height and weight for baseline assessment
- Medical history: Detail conditions, medications, and allergies that might affect treatment
- Facial assessment: Evaluate muscle bulk, desired slimming level, and previous experience
- Treatment goals: Specify primary focus (cosmetic, therapeutic, or combination)
- Generate results: Receive customized unit recommendations and cost estimation
Key input considerations:
• Muscle mass assessment: Be honest about jaw clenching habits and visible muscle bulk
• Desired outcome: Realistic expectations yield more accurate recommendations
• Previous experience: Report actual units used, not just treatment locations
• Budget parameters: Helps tailor suggestions to financial constraints
The calculator's algorithm weights different factors based on evidence-based importance. Muscle mass and gender contribute approximately 60% to the final calculation, while other factors fine-tune the recommendation. The output includes both initial and maintenance dosing suggestions.
Patients should bring calculator results to consultations as a discussion starting point rather than a definitive prescription. Experienced practitioners will combine this information with physical examination to finalize treatment plans.

Frequently Asked Questions
How soon will I see results from masseter Botox?
Initial reduction in teeth grinding and jaw tension begins within 3-7 days. Visible slimming becomes noticeable at 4-6 weeks, with maximum contouring achieved at 2-3 months post-treatment.
Can masseter Botox help with wide jaws caused by bone?
Botox only addresses the muscular component of jaw width. Patients with significant bony prominence may achieve modest improvement but will not experience dramatic narrowing without surgical intervention.
Is masseter Botox painful?
Most patients describe the sensation as quick pinpricks with minimal discomfort. The masseter muscle is relatively insensitive compared to other facial areas. Ice application before treatment can further reduce sensation.
What happens if I stop masseter Botox treatments?
The muscle will gradually return to its original size over 6-12 months as nerve connections regenerate. There is no permanent change or rebound effect, though some patients maintain minor improvement long-term.
Can masseter Botox cause sagging skin?
When appropriately dosed, masseter Botox should not cause significant sagging. Over-treatment in patients with existing skin laxity may accentuate jowls, which is why conservative approaches are recommended for mature patients.
How does masseter Botox differ from jawline filler?
Botox reduces muscle bulk to decrease width, while filler enhances definition along the jawline border. The treatments work through opposite mechanisms but can be combined for comprehensive contouring.
Are the results of masseter Botox permanent?
No, results are temporary, typically lasting 4-6 months. Maintenance treatments are required to sustain the slimming effect, though some patients experience slightly longer duration with repeated sessions.
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