No bottle advertises its sweetener content. Almost every bottle has one, and the amount varies enormously between brands making otherwise similar products.

This is, we would argue, the most consequential undisclosed variable in e-liquid — more than PG/VG ratio, which everyone prints, and more than most of what appears in the flavour description.

Why it matters for flavour

Sweetness is the cheapest way to make a blend read as full. A thin fruit blend with sucralose pushed hard tastes immediately impressive and gets less interesting with every subsequent puff, because sweetness fatigues the palate faster than any other dimension. This is the mechanism behind the very common experience of loving a juice for a day and finding it cloying by the end of the bottle.

Restrained blends do the opposite. They are less striking at first and hold up over a tank. Our own bias, declared: we prefer the second kind, and we try to distinguish “I did not enjoy this” from “this is badly made” when a heavily sweetened juice is competently built. Plenty are.

Why it matters for hardware

Sucralose caramelises on a hot coil. The residue is the dark crust that appears on wicking after a few tanks, and it is the main reason a coil that should last two weeks lasts four days.

That connection is not obscure, but it is rarely made explicit at the point of sale, which means people routinely blame hardware for a liquid problem. If your coils are dying fast and you have recently changed juice rather than device, the juice is the more likely culprit.

What would help

Disclosure, and specifically quantified disclosure. A stated sweetener content would let buyers predict both the flavour arc and the coil cost of a bottle before opening it. A small number of brands describe their approach in general terms — “lightly sweetened”, “no added sweetener” — which is better than silence and still not a number.

Until that changes, the practical proxies are: how dark the liquid goes in the tank, how quickly the coil discolours, and whether the flavour is still interesting at the bottom of the bottle. All three are things a buyer discovers after paying.

Ingredient and testing claims here are the manufacturer’s, and we attribute them as such. Everything discussed contains nicotine — an addictive chemical — and this site is for adults of legal purchase age only: 21 or over in the United States, 18 or over in most other markets.