Xeomin. The naked neurotoxin.

Every botulinum toxin product is built around the same working part: a 150-kilodalton neurotoxin protein that blocks the nerve-to-muscle signal. In Botox and Dysport, that protein arrives wrapped in accessory proteins — leftovers of the bacterial complex it's purified from. They don't contribute to the effect; they're packaging.

Xeomin's manufacturing strips the packaging away. What's injected is the active molecule and nothing else. In the chair, the experience is familiar — same injection pattern, same brief sting, same gradual onset. The difference is invisible at the appointment and only potentially meaningful over years of treatment.

A small number of long-term neurotoxin patients develop antibodies against the proteins they're repeatedly injected with — and some of those patients notice their results fading faster, or requiring more units than they used to. The accessory proteins in conventional formulations are one suspected contributor, since they give the immune system more foreign material to react to.

Two honest caveats. First, true antibody-mediated resistance is uncommon — most 'my Botox stopped working' stories trace to dosing, placement, or expectations rather than immunology. Second, the evidence that a protein-free formulation prevents resistance is suggestive rather than settled. What we can say plainly: for a patient whose response has genuinely declined over years of consistent treatment, switching to an uncomplexed formulation is a sensible, low-risk next step — and for some patients starting out with decades of treatment ahead of them, it's a reasonable opening choice.

Unlike Dysport, Xeomin doses 1:1 against Botox — twenty units of one is twenty units of the other, which makes switching between them straightforward and keeps pricing comparisons clean. Onset is similar too: visible softening at 5–7 days, full effect around two weeks, duration typically 3–4 months.

Treatment areas mirror Botox's: glabella, forehead, crow's feet, and the smaller indications — lip flip, chin, masseter — where a precise, contained spread is what you want. Xeomin diffuses about like Botox does, which is to say tightly; for very broad zones, some patients prefer Dysport's wider footprint instead.

Three groups, in practice. Long-term patients whose results have shortened and who want to rule formulation in or out. Patients who simply prefer the most stripped-down version of the product — fewer ingredients, same effect — as a matter of temperament. And patients switching between products for scheduling or availability reasons, who value the 1:1 dosing because nothing about their plan has to be recalculated.

If none of those describe you, Botox, Dysport and Daxxify each have their own argument — onset, spread, duration — and the menu exists so the product can be fitted to the patient rather than the reverse. Discussed at consultation.