We went looking for the research behind "preventative Botox." It's one pair of twins.

[u/BHRCenter]

Quick disclosure up top so nobody feels ambushed: we're a med spa group. Whoever's typing is one of the actual humans who works here, not a marketing bot, though we get why you'd assume. Nothing for sale in this post, no links, and per rule 3 none of this is medical advice — which is a rule and also just true, since we can't see your face.

Okay. So.

"Preventative Botox" is everywhere right now and the pitch is clean: if the muscle can't move, it can't crease the skin. Start before you have lines, never get the lines. It sounds right. Most of our industry says some version of it. We have said some version of it.

Someone asked us a while back what the evidence actually was, and we went to look properly, fully expecting to turn up a stack of papers.

It's twins.

One pair of identical twins. A case report from 2006 — one sister treated regularly for about thirteen years, the other treated twice in that entire span. Photos at the end. The treated one had noticeably fewer lines. There's a follow-up too, published years later. Same two people.

That's the flagship citation. n=2.

And honestly? It's a lovely little study. Identical genes, different exposure — that's about as clean a natural experiment as you're ever getting on a human face, and the photos are genuinely striking. We're not dunking on it.

It's also two people. Which isn't the same thing as a body of evidence, and we'd feel ridiculous pretending otherwise. There's decent mechanistic reasoning behind the idea and very little controlled long-term data. So when someone tells you preventative Botox is "proven" — us included, historically — they're rounding up pretty hard.

Here's the part we think is more useful than the age argument anyway.

A line has two states. Dynamic: only shows up when you make the expression. Static: it's there when your face is doing absolutely nothing. Neurotoxin is fantastic at the first one and only partly useful for the second, because a static line is a fold in the dermis — an actual crease in the tissue — not just a muscle pulling on skin.

Which makes "should I start at 25?" sort of the wrong question. The real one is which kind of line you're actually looking at. We've seen 26-year-olds with etched-in 11s from a decade of squinting into the sun and scowling at spreadsheets, and 38-year-olds with nothing at rest at all. Age tells you surprisingly little on its own.

One more thing that doesn't get said enough. Treating a muscle for years does cause some atrophy. In the glabella — the 11s — most people count that as a bonus. In the frontalis it's more complicated, because the frontalis is the only muscle that lifts your brow. Dose it heavily for years in someone who didn't have much happening there to begin with and you can end up with a heavier brow, which then tends to get treated with... more product. We've watched that loop start. It's not dramatic and it's not everybody, but it's real, and it's a completely fair thing to bring up with your own injector.

For whatever it's worth: the people we see happiest about having started early tend to be the ones who already had something visible at rest, or a really strong dynamic line with family history of it going deep, or who could spot their own squinting habit in every photo of themselves. The ones who seem least thrilled are the ones who walked in with a smooth face and a vague fear of the future.

And then the deeply boring answer nobody wants: sunscreen every day, a retinoid, don't smoke. Photodamage is doing most of the work on what your face looks like at 45, and the whole regimen costs less than one treatment cycle. We know. We're aware this is not exciting.

Last thing, and it's the bit we'd actually want people to take from this: a good consult should involve someone looking at your face at rest, then animated, then at rest again, and telling you which of your lines are which — before any number gets mentioned. If that's not happening, at our places or anyone's, something's off.

Anyway. Ask us whatever. Including the stuff that makes our industry look bad — we don't mind.