Nicotine salts explained

What nicotine salt actually is

In a tobacco leaf, nicotine occurs naturally bound to organic acids as a salt. Freebase nicotine is the chemically stripped, more alkaline form used in most older e-liquids. Nicotine salt e-liquid re-adds an acid, returning nicotine to a protonated form with a lower pH.

Nicotine salts vs freebase nicotine

The practical difference is harshness. Alkaline freebase nicotine irritates the throat sharply above roughly 12 mg/ml, which caps usable strength. Nicotine salt is far smoother at the same strength, which is why sealed devices can carry 20–50 mg/ml without being unusable.

Flavour and vapour volume are set by the e-liquid base and coil, not by the salt itself.

Absorption and how fast nicotine acts

Protonated nicotine is absorbed efficiently through the lung, and the lower pH allows a higher delivered dose per puff without the throat irritation that would otherwise limit inhalation. The result is a faster and steeper rise in blood nicotine than a comparable freebase liquid at low strength — which also means a higher potential for dependence.

Reading strength labels

Strength appears either in mg/ml or as a percentage of the liquid by weight. The conversion is straightforward: 2% is about 20 mg/ml, 3% about 30 mg/ml, 5% about 50 mg/ml. A device's total nicotine content is strength multiplied by liquid volume, so a 2 ml pod at 50 mg/ml holds roughly 100 mg of nicotine.

Nicotine, dependence and health

Nicotine is an addictive stimulant. It raises heart rate and blood pressure, and dependence can develop quickly at the strengths typical of salt-based products. Nicotine is not suitable for anyone under 21, non-smokers, pregnant or breastfeeding women, or people with heart, respiratory or blood-pressure conditions.

Withdrawal typically brings irritability, difficulty concentrating, restlessness, low mood and disturbed sleep, peaking in the first week. India's National Tobacco Quitline and district tobacco cessation centres provide free support.