In 1979, a twenty-five-year-old chemist named Thomas Perfetti was given a confidential assignment by his employer, the R.J. Reynolds Tobacco Company. Over six months, he synthesized thirty nicotine salt formulations in a company lab, one of which, rather charmingly, smelled like green apples.
Reynolds patented the technology, filed it in a drawer, and carried on selling cigarettes in the usual manner. The research sat there, undisturbed, for the better part of four decades.
Then, in 2015, a vaping startup founded by two Stanford graduates launched a sleek device that would dominate the American market. Its secret weapon was not new. It was Perfetti’s formula, dusted off and repackaged with venture capital and a minimalist logo. Silicon Valley had disrupted Big Tobacco. The revolution, it turned out, was a photocopy.
What Salt Really Means
There is a widespread belief that nicotine salts are a modern invention, cooked up in a San Francisco lab by earnest young men in slim-fit chinos. They are not. Nicotine exists naturally as a salt in the tobacco leaf. Freebase nicotine (used in cigarettes since the 1960s) is the modified version, developed by Philip Morris using ammonia. Freebase is the engineered product. Nicotine salt is the original.
The word salt refers to an acid-base reaction and has nothing to do with sodium, despite what a surprising number of people appear to believe. What most don’t realize, however, is that nicotine salt is not one thing. At least six acids are used commercially, including benzoic, lactic, levulinic, citric, salicylic, and tartaric, with each one producing a different sensory profile and toxicant output.
Consumers tend to treat nic salts as a single category, much in the same way people treat red wine as a single drink. It isn’t, and the differences matter far more than anyone is bothering to explain.
The Paradox
Freebase nicotine is, milligram for milligram, the more potent form. It reaches higher blood concentrations and produces equivalent dopamine at lower doses. By any reasonable metric, freebase should be the more addictive formulation.
And yet nicotine salts drive greater behavioral reinforcement. People use them more, more often, and with greater enthusiasm. The reason is not the molecule itself, but rather the absence of discomfort.
Nic salts have a lower pH, meaning they are dramatically smoother on the throat. A 2021 trial of 119 adults confirmed this: nic salt formulations scored significantly higher on appeal and smoothness, drastically lower on harshness. The throat hit that makes freebase unpleasant at high concentrations simply disappears.
You might say the effect is rather like removing the grimace from tequila. The alcohol doesn’t get stronger, but you will drink considerably more of it when it stops burning on the way down.
Two Very Different Bottles
In America, nic salts are sold at 50 to 59 milligrams per milliliter. In the United Kingdom, regulations cap nicotine at 20. A Dutch study found no sensory difference between nic salts and freebase below 20 milligrams, suggesting the magic of nicotine salts may be entirely concentration-dependent. Transformative at American dosages. Negligible at British ones.
The two countries are selling different products under the same label. UK retailers stock nic salt vape juice at regulated strengths, and British consumers actively choose the lower end, with 10mg outselling 20mg by three to one. The American market, uncapped and largely unguided, trends in the opposite direction. Seventy-three percent of products in US stores carry concentrations of five percent or higher.
One market is tapering itself down, while the other, across the pond, is turning the dial up.
The Wrong Audience
The trial contained one finding that nobody in the vaping debate seems keen to discuss. The smoothness and appeal advantages of nicotine salts were most pronounced among never-smokers. Not former smokers trying to stay off cigarettes, but people who had never actually touched one.
Nic salts lower the barrier to entry most effectively for the exact population harm reduction is not supposed to reach. Indeed, a study of young adults in Ohio found that 98.9 percent used nic salts, and every single participant used flavored liquid.
Meanwhile, 2.9 million American adults quit smoking between 2021 and 2022, with e-cigarettes accounting for over forty percent of those quits. The molecule that helps smokers escape is the same one that makes starting remarkably easy for people who never needed to escape anything. This is the tension neither side wants to sit with, because it doesn’t suit anyone’s talking points.
Same Compound, Different Century
The nicotine salt hasn’t changed since Perfetti synthesised it in a Reynolds lab in 1979. What changed is who sells it, at what strength, and inside what story. In one country, it is a regulated cessation tool dispensed at measured doses. In another, it is a consumer product sold at triple strength in gas stations with no quit-smoking guidance attached.
The disruption was never chemical. It was commercial. And somewhere in Winston-Salem, Perfetti’s green-apple formula is gathering dust, largely unaware that it accidentally built a forty-billion-dollar industry.