Facial injectables such as Botox can be very effective in helping our clients in Vancouver achieve facial slimming. Slimming the masseter muscles in the jawline can help turn a square-shaped face into a more oval shape, which often appears more youthful and aesthetically pleasing. Our highly trained doctors can help you achieve this more tapered facial shape by precisely placing neuromodulator treatments, such as Botox® or Dysport®, into the masseter muscles. 

Facial Slimming Botox graphic vancouver sparrowmd


  • Length of Treatments: 30 minutes
  • Recovery Time: None
  • Onset of Action: 2-4 weeks to start seeing the facial slimming effect
  • Cost: Varies depending on the size of the masseter muscle and your aesthetic goals
  • Results: 3-6 months
Facial Slimming Botox graphic vancouver sparrowmd


Due to genetic and lifestyle factors, your masseter muscles in the back of the jaw may enlarge over time. With repetitive chewing, clenching, or dental grinding, your facial shape may become more square over time. With Botox® treatment, our doctors can help you make a significant cosmetic improvement by downregulating these muscles, which can help slim the face and achieve a more aesthetically pleasing, tapered facial shape.

As a side benefit, this treatment is also helpful for relieving other symptoms related to the hypertrophy of the masseter muscles, such as jaw pain, headaches, or clenching.


At Sparrow MD, we offer different brands of neuromodulators approved by Health Canada that can reduce muscle size: 

Our doctors would typically choose Botox® or Dysport® for better diffusion and spread for facial slimming. We find that this generally results in better longevity of results for our patients. At Sparrow MD, we carry multiple brands of neuromodulators and will choose the best option for our patients. This can be discussed during the consultation process.


In addition to Dysport® /Botox® treatments, which can help our clients achieve cosmetically improved facial shape, our clients may choose other treatments for aesthetic enhancements: 

  • Dermal Fillers- to restore facial volume, contour the face, and improve facial balance.  
  • Belkyra®/Kybella®- to reduce the appearance of submental fullness and create a better jawline and chin shape
  • Ultherapy®- to aid in skin elasticity and skin tightening
  • Microneedling- to soften lines and wrinkles by inducing collagen production
  • Medical Grade Skincare- to enhance and maintain facial treatment results


Botox®, administered by skilled medical professionals, offers temporary muscle relaxation for therapeutic and cosmetic purposes. With a track record of over 25 years, Botox® stands as a secure and efficient treatment. Though generally safe, there are potential side effects, such as temporary bruising, mild discomfort, swelling, or redness at the injection site. More uncommonly, slight asymmetry, a temporary crooked smile, or mild facial drooping could occur. However, it's important to note that these effects are exceedingly rare and temporary, with the possibility of mitigation during your follow-up appointment. At Sparrow MD, our team comprises highly trained physicians who possess the expertise and experience necessary to ensure you achieve optimal results, all while placing utmost emphasis on safety and effectiveness.

Facial Slimming Botox injection markings at Sparrow MD


How many units of Botox® is recommended for facial slimming?

For facial slimming, the range of Botox® units required may vary between 15 to 50 units, depending on the strength of the masseter muscles. On average, 15-25 units may be helpful. For people with especially strong masseter muscles that are large, a higher number of units may be required. For our Asian and male clients, a higher number of units may typically be required. 

How long does it take for master Botox® to slim your face?

You may expect to see the slimming effects of masseter Botox® around the 4 to 6 weeks. The slimming effect sets in gradually, and the result will look natural. While your friends and family may notice a resemblance to weight loss, it should otherwise be a gradual and natural change. 

How long does facial slimming Botox® treatment last?

Facial slimming Botox® usually lasts up to 4 to 6 months. For best results, a maintenance treatment every 3-4 months is usually recommended for strong masseter muscles. As the result wears off, you may notice your facial shape returns to its previous state. With repeated Botox® treatment, the masseters become more relaxed at baseline and may give you a contoured jawline for much longer. 

Does your face sag more after masseter Botox?

At Sparrow MD, our doctors will always assess the masseter muscles' strength to ensure the dose you receive is appropriate for your aesthetic goals. Rarely, masseter Botox® can cause mild sagging if our clients are sensitive to the treatment. This is usually temporary and will resolve after the effect of Botox® wears out. 

Does facial slimming Botox® help with the jawline or correct jowls?

Some patients may expect masseter Botox® to improve their jowls and jawline. Unfortunately, masseter Botox® is not an effective tool for correcting sagging jowls. For our patients who already have jowls or reduced skin and soft tissue elasticity, we typically would not recommend masseter Botox®. Nefertiti lift, including lower face and neck Botox®, or dermal fillers may be better options for treating lower face sagging.  

How often should you get masseter Botox® to slim your face?

Many of our patients with strong masseter muscles return for maintenance treatments every 3 to 4 months. Patients who have received facial slimming Botox® regularly for over 12 months may see a significant improvement in their results and may wait longer between treatments. 

Does Botox® for facial slimming affect my smile or ability to chew or swallow? 

In well-trained hands, Facial slimming Botox® should not affect your ability to smile, chew, or talk. We recommend not touching the injected area and not lying down for 4 hours after treatment to avoid migration of Botox®  to other muscles. With our doctors’ expert knowledge of facial anatomy, there is minimal risk of the treatment affecting your smile. The carefully determined dose is designed to have minimal interference with your chewing or swallowing abilities. Our doctors may choose a conservative approach in the initial treatment to maximize safety and minimize the potential for any treatment-related side effects.