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A complete head-to-head comparison of the two main e-liquid formats: nic salts and freebase nicotine. Everything from throat hit and absorption speed to device compatibility, flavour intensity and cost per session.
Quick Answer: Nic salts are smoother at high strengths, absorb faster and suit pod kits. Freebase nicotine gives a stronger throat hit, suits a wider range of devices and is typically used at lower strengths (3mg to 12mg). For ex-smokers switching to vaping, nic salts at 10mg or 20mg in a pod kit deliver the closest match to cigarette satisfaction. Freebase suits experienced vapers who prefer throat hit sensation or use sub-ohm setups for cloud production.
Both nic salts and freebase e-liquids contain the same four base ingredients: Vegetable Glycerin (VG), Propylene Glycol (PG), flavourings and nicotine. The only difference is the form the nicotine takes and that single difference changes everything about the vaping experience.
Freebase nicotine is nicotine in its unbound, pure state. It has a high pH of around 7 to 8, which makes it alkaline. That alkalinity produces a sharp throat hit at higher concentrations and slows absorption compared to nicotine in salt form. Nic salt e-liquid uses nicotine bonded with benzoic acid. This drops the pH to around 5 to 6, removes the harshness and allows nicotine to cross into the bloodstream significantly faster.
The table below covers every practical difference between the two formats. Use it to identify which type matches your device, your current nicotine intake and the kind of vaping experience you are looking for.
| Factor | Nic Salts | Freebase Nicotine |
|---|---|---|
| Nicotine form | Nicotine bonded with benzoic acid | Unbound, pure nicotine |
| pH level | 5 to 6 (lower) | 7 to 8 (higher) |
| Throat hit | Smooth at all strengths | Mild at 3-6mg, harsh above 12mg |
| Absorption speed | 6 to 10 seconds | 10 to 20 seconds |
| Typical UK strengths | 5mg, 10mg, 20mg | 3mg, 6mg, 12mg, 18mg |
| VG/PG ratio | Typically 50/50 | 50/50, 70/30 or higher VG |
| Best devices | Pod kits, MTL starters (below 18W) | Pod kits, pens, mods, sub-ohm tanks |
| Cloud production | Discreet, controlled | Larger clouds possible with high-VG |
| Flavour intensity | High, especially bar salts | Good at low strength; can mute at high |
| E-liquid used per session | Less (cravings satisfied faster) | More (slower absorption = more puffs) |
| UK bottle size (with nicotine) | 10ml maximum | 10ml (or shortfill + nic shot) |
| Best suited to | Ex-smokers, pod users, beginners | Experienced vapers, cloud chasers, DTL |
For most vapers the throat hit is the first and most noticeable difference between the two formats. Freebase nicotine at 12mg produces a firm, scratchy sensation at the back of the throat. Some former smokers actually prefer this because it feels familiar. Above 12mg the harshness becomes uncomfortable for the majority of users, which is why freebase liquids are rarely sold above 18mg in the UK.
Nic salts at 20mg can feel as smooth as freebase at 3mg or 6mg. The benzoic acid lowers the pH and removes the alkaline irritation entirely. This means you can vape at a genuinely satisfying nicotine concentration without any discomfort. For anyone who tried freebase vaping at higher strengths and found it too rough, switching to nic salts at the same or higher concentration is often the difference between vaping working as a smoking substitute and going back to cigarettes.
If you miss the sharp, firm sensation of a cigarette throat hit, freebase at 12mg or 18mg in a 50/50 MTL device delivers that sensation. Some long-term vapers specifically prefer the feedback freebase provides at moderate strengths.
If you want strong nicotine satisfaction without throat irritation, nic salts at 20mg in a pod kit deliver the nicotine hit of a heavy smoker's cigarette with almost no throat harshness. The satisfaction comes from the strength and speed of absorption rather than the physical sensation of the hit.
Device compatibility is the most practically important difference between the two formats. Nic salts are strictly limited to low-wattage setups. Freebase nicotine at low strengths works across the full range of device types. The table below summarises what to use in each setup.
| Device | Nic Salts (10-20mg) | Freebase (3-12mg) |
|---|---|---|
| Refillable pod kit | Ideal | Yes (50/50) |
| MTL vape pen / starter | Yes | Yes |
| Sub-ohm tank | Never | Yes (use 3-6mg high-VG) |
| Box mod / high-power device | Not recommended | Yes (3-6mg, high-VG) |
| RDA / rebuildable | Not suitable | Yes (experienced vapers only) |
All Vapers Pantry nic salts are TRPR-compliant, sourced from trusted UK brands and available online with fast UK delivery or free Click and Collect from our Wolverhampton store.
Flavour intensity is another area where the two formats differ noticeably. Freebase nicotine at higher strengths can mute flavour slightly because the alkaline nicotine molecule competes with the flavour compounds. At 3mg or 6mg freebase the flavour is clean and nuanced, which is why many experienced vapers using shortfills prefer the format for complex, layered e-liquid profiles.
Nic salt e-liquids, particularly bar salts, use double-concentrated flavourings that produce very vivid, intense taste profiles even at 20mg. The lower pH does not interfere with flavour compounds in the same way, which is one reason bar salts replicate the intense taste of disposable vapes so accurately.
On cost, nic salts typically cost less per session than their freebase equivalent even though the price per bottle is similar. Because nic salts satisfy cravings faster through quicker absorption, most vapers use less liquid per day compared to equivalent freebase setups. Over the course of a month the saving can be meaningful, particularly following the October 2026 Vaping Products Duty that applies equally to both formats.
Neither format is universally better. The right choice depends on your device, your goals and the kind of experience you want from vaping.
You are switching from cigarettes and need fast, strong craving relief. You use or plan to use a refillable pod kit. You want the intense flavour of disposable-style bar salts. You prefer a smooth inhale without throat harshness. You want to use less e-liquid per day for better value.
You enjoy the throat hit sensation from your vaping. You use a sub-ohm tank or high-power mod for cloud production. You prefer nuanced, complex flavour profiles at lower nicotine strengths. You have already stepped down from higher nicotine and want to continue reducing gradually.
Our full guide library covers every nic salt question in depth. Browse strengths, devices, safety, comparisons and more.
In terms of total nicotine content per ml, yes. The difference is in how each is experienced. 20mg freebase would be extremely harsh, making it almost unvapeable for most people. 20mg nic salt feels smooth due to the lower pH. The nicotine molecule itself is the same in both; it is the chemical form it takes that changes the experience.
Yes, many vapers use both. The important thing is to match the format to the device. Use nic salts in pod kits and MTL starters. Use freebase at lower strengths in sub-ohm setups or higher-power devices. Do not mix the two in the same tank as this creates unpredictable throat hit and nicotine delivery.
The nicotine molecule itself is the addictive substance in both formats. Nic salts absorb faster which may reinforce habitual use more strongly, similar to how a cigarette's rapid nicotine delivery contributes to its addictive nature. Using the lowest strength that satisfies your cravings is always the sensible approach regardless of which format you choose.
For many vapers, yes. The lower pH of nic salts does not interfere with flavour compounds in the same way high-pH freebase does at equivalent strengths. Bar salts with double-concentrated flavourings are particularly vivid. However, some experienced vapers prefer the nuanced, less sweet profiles common in freebase shortfill e-liquids. Flavour preference is subjective.