I put drugs into people for a living.
That's the job. An anesthesiologist is, more or less, the person you trust to push powerful substances into your body while you're unconscious and can't supervise.
So needles don't register for me. They're Tuesday.
But I remember when they registered for everyone else.
A few weeks ago I was at a backyard cookout, talking to a guy I've known for years who has, his entire life, been a complete coward about needles. The kind who looks away during a flu shot and needs a minute on the table afterward.
And there he was, between bites of a burger, casually pulling out his phone to show me the little auto-injector pen he uses every Sunday for his GLP-1. Talking about his weekly shot the way you'd talk about a new coffee maker.
Ten years ago, if you'd told this man he'd be injecting himself once a week, and bringing it up at a party, he'd have turned green.
Now half the cookout was comparing notes.
What changed
For my entire career, a needle you stuck in yourself meant one of two things. You were sick, or you were in trouble. Insulin or addiction. The self-injection was the symbol of the scary thing: the diagnosis, the habit, the bottom.
Now it's a wellness ritual. It's aspirational. People compare pens at brunch.
And here's what gets me: nothing about the needle changed. Not the gauge, not the act, not the tiny sting. The only thing that changed was the meaning.
We took the single most universally dreaded little object in medicine and, in about three years, turned it into a status symbol.
I went down a rabbit hole trying to understand how a fear that deep just… evaporates. I'm not a psychologist, but the research is clear, and a little unsettling.
There's a principle the psychologist Robert Cialdini spent his career on, and it's brutal in its simplicity: we decide a behavior is correct in proportion to how many other people we see doing it. Not by thinking it through. By counting heads.
So when your coworker starts, and then your sister, and then someone you saw on TV, your brain quietly moves injecting myself out of the "absolutely not" folder and into the "I guess that's normal now" folder.
You didn't reason your way there. You got outvoted.
There's a name for how fast this flips, too. Researchers call it a preference cascade: everyone's privately on the fence, until enough people go first, a threshold tips, and suddenly the thing is everywhere and nobody remembers being afraid of it.
The needle taboo didn't fade. It fell off a cliff.
Add a prescription, a brand name, and a doctor's nod, and the last of the yuck washes away. Legitimacy launders almost anything.
The part that worries me
For GLP-1s, honestly, a lot of this is fine. These are tested, approved, prescribed medicines that are genuinely helping a lot of people.
If social proof is what finally got someone over an irrational fear so they could take an effective drug their doctor recommended, great. I mean that.
But here's the thing I can't unsee as a doctor.
The psychology doesn't stop at the safe stuff. It bleeds.
Once "injecting myself is normal," the guard doesn't come down halfway. It comes all the way down.
So now I watch people buy peptides off the internet (BPC-157, TB-500, the whole alphabet soup of "recovery" and "anti-aging" compounds) sold on the same websites as phone cases, and put them into their bodies at the kitchen counter.
And the logic in their head is exactly the logic social proof built: Everyone's injecting something now. It's just a peptide. I already do this anyway. What's the difference?
The difference is everything.
Social proof changed how we feel about the needle. It did not change what's inside the syringe.
Research only
Here's the part I'd tattoo on people if they'd let me.
Most of those peptides are sold under three little words: research use only. And people read that like it's a formality. A wink. Some legal throat-clearing to scroll past.
It is not.
"Research use only" is a trapdoor. It means the thing was never tested to go into a human being. It lets the seller skip the clinical trials, skip the purity testing, skip the manufacturing oversight that every real medicine has to survive, and hand every bit of that risk to you.
The label isn't hiding the truth. The label is the truth.
This isn't me being dramatic. The FDA has been firing off warning letters about exactly this: peptides marketed "research use only" while everyone winks and injects them anyway.
The reasons they list are the boring, terrifying ones. You don't actually know what's in the vial, you don't know how your immune system will answer it, and nobody knows a safe dose, because the human studies simply don't exist.
So when the label says research only, believe it.
For God's sake, research only means research only.
The bottom line
I want to be clear, because it's easy to hear this as cranky. I'm not anti-needle, anti-GLP-1, or anti-progress. I inject people for a living, and I think a lot of modern medicine is a miracle.
The point isn't that needles are bad, or that people are suckers.
The point is that "everyone's doing it" is the oldest and most powerful safety signal we have, and one of the least reliable.
Our comfort with almost anything, from what we inject to how we live, gets set by the crowd around us, not by whether the thing is actually safe. Comfort is a feeling. Safety is a fact. They come from completely different places, and we mistake one for the other constantly.
The needle just makes it easy to see.
So here's my question for you this week: Where have you let everyone's doing it quietly stand in for this is safe for me? What did you stop questioning the moment it stopped looking strange?
Reply and tell me. I can't write back to everyone, but I read every single one.
That's all for this week.
See you next Saturday.