Stop buying perfume blind.
What a bottle does on your skin is physics, and the physics doesn't change between brands. Learn the five rules once and every bottle in the shop makes sense.
Get the five rules
A 15 page guide, free until the end of November.
25,000 followers 15 episodes every claim sourced
THE BUYER'S GUIDE
How to buy a perfume that works on you.
Fifteen pages for the moment before you spend money. The five rules that apply to every bottle. What the words on the box mean and don't. How to test in a shop without being fooled by the first minute or by your own nose. Which concentration to buy for your skin, your weather and your day. The wrist test to run at home, the spray rules, and a checklist to screenshot before you pay.
The guide opens here as soon as you send the form. After that, one email when a new episode is out, and nothing else. Unsubscribe is one click and I won't take it personally.
THE EPISODES
Sixty seconds each. Watch them in order or don't.
You can't smell your own perfume
Rubbing your wrists doesn't crush it
Beast mode isn't in the bottle
Why a scent brings back memories
1 in 10 people can't smell your musk
Skin chemistry doesn't change your perfume
Not weaker in winter
Your perfume has no top notes
Your perfume is 80 percent alcohol
The smell that cleared a city
This came out of a whale
The bathroom is ruining your perfume
Your favourite perfume isn't what it was
How to make your perfume last longer
HOW THIS IS MADE
Every number in the videos comes from somewhere.
This is a science channel. Each episode starts with the papers, not with a hook. The script says "roughly" and "most likely" when the evidence does, because perfume is full of confident people quoting numbers nobody measured. When something turns out wrong, the next episode says so.
If you spot a mistake, write to hello@frag-science.com and I'll fix it in public.
011 in 10 people can't smell your musk
For some musks, roughly one in ten people have no key at all.
02Why a scent brings back memories
In one study of older adults, smell-cued memories often came from before age ten, and felt especially like being transported back in time. It's a finding, not a rule.
Source: Willander and Larsson, Psychonomic Bulletin and Review, 2006
03Not weaker in winter
Every ten degrees roughly halves the rate.
Source: There is no single paper for this one. It follows from the vapour pressure curves of common fragrance materials, which is why the video says roughly.
Marked words are the hedges. They are in the script because they are in the source.
WHO
A small team in Europe who got tired of guessing.
We started Frag Science in October 2026 after spending too much on bottles that didn't do what the counter promised. The first video got 884,000 views in a week, which told us a lot of people felt the same. No brand pays for the opinions here. When a sponsor is involved it says so on the video.