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Aesthetics
Calf slimming uses botulinum toxin in the calf muscle where the bulk is muscular rather than fat. It is assessed and injected by an SMC-registered doctor.
Quick answer
Botulinum toxin placed in the calf softens muscular bulk over weeks. It is a functional muscle used in walking, running and standing, so the effect on activity is discussed and dosed for before treatment.
Verified by Dr. Anthony Stanislaus, MBBS, PBM, Cert. Men's Health · Last reviewed 13 August 2026 · Next review 13 February 2027
Medically reviewed by Dr. Anthony Stanislaus, MBBS, PBM, Cert. Men's Health
Last reviewed 13 August 2026 · Next review 13 February 2027
The visible bulk of the calf is mostly the gastrocnemius. Where that muscle is genuinely prominent, reducing its activity softens the contour over weeks.
The calf does real work every day. Dosing is conservative and staged, and if you run or train seriously your doctor will set expectations about that before anything is injected.
Assessment first: your doctor examines the calf standing and on tiptoe, to establish which head of the gastrocnemius is prominent and whether the bulk is muscular at all.
Injection points are marked across the medial and lateral heads of the muscle.
Injections are placed conservatively and in stages, because the calf carries you all day. Session length is set by your doctor at consultation.
The contour softens gradually as the gastrocnemius reduces, and because the muscle is load-bearing the change is deliberately partial. Results vary between individuals and cannot be guaranteed.
How quickly botulinum toxin acts, and why a review is booked before any further dose, are covered on the anti-wrinkle injections page.
Pinpoint marks and occasional bruising. Calf aching or a feeling of heaviness for a few days is common, and stairs, running and tiptoe work can feel weaker for a period.
The general aftercare for any toxin treatment, including the twenty-four hour restrictions, is set out on the anti-wrinkle injections page.
Dosing is staged, so the plan is judged over more than one session rather than settled at the first. The effect wears off, and the interval is set by your doctor at review.
What moves the cost of calf slimming is the dose the calf muscles need, which is large by comparison with facial dosing, and whether one or both legs are treated.
Botulinum toxin is a prescription-only medicine and is described here in generic terms rather than by brand. The product used and its batch number are recorded in your notes at the time of treatment.
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In line with the advertising rules for licensed clinics in Singapore, we do not publish before-and-after photographs or patient testimonials that imply a specific outcome. Results vary between individuals and cannot be guaranteed. Your doctor will set realistic expectations for your situation at your consultation.
The same principle applied to the trapezius.
The same principle applied to the masseter.
How botulinum toxin works, and the aftercare common to every toxin treatment.
Where the concern is body composition rather than a single muscle.
The wider men's health service.
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