If you've just bought a pod kit and you're standing in front of a wall of e-liquid bottles, you've probably noticed two labels: "nic salts" and "freebase". Pick the wrong one and your kit will either feel like vaping water or like sandpaper on your throat. This guide explains the difference in plain English and tells you exactly which to buy.
What Is Freebase Nicotine?
Freebase nicotine is the "original" form of nicotine used in e-liquids since the start of vaping in the 2000s. It's purified nicotine in its natural alkaline (high pH) state. At higher strengths it gives a harsh, scratchy throat hit — great for cloud-chasers using powerful sub-ohm box mods, terrible in a small pod kit.
Typical freebase strengths in the UK: 0mg, 3mg, 6mg, 12mg, 18mg.
What Are Nicotine Salts?
Nicotine salts (nic salts) are freebase nicotine combined with benzoic acid. The acid lowers the pH, which does two huge things: it makes the hit feel much smoother at high strengths, and it absorbs into your bloodstream 3–5 times faster than freebase.
Peak nicotine levels with nic salts: 1.2–1.5 minutes. With freebase: 5–8 minutes. That's why disposables (and the pod kits that replaced them) almost all use nic salts — they're the closest experience to the rapid hit of a cigarette.
Typical nic salt strengths in the UK: 10mg, 20mg (20mg is the legal maximum).
The Quick Answer: Which One for Your Pod Kit?
If you're vaping a pod kit (refillable or pre-filled), use nic salts. Nine times out of ten that's the right answer. Freebase belongs in bigger sub-ohm tanks and box mods.
Side-by-Side Comparison
| Feature | Nic Salts | Freebase |
|---|---|---|
| Throat hit at 20mg | Smooth | Harsh / scratchy |
| Absorption speed | ~1.5 minutes | ~6 minutes |
| Best device | Pod kits, low-wattage MTL | Sub-ohm tanks, box mods |
| UK legal strengths | 10mg, 20mg | 0–18mg |
| VG/PG ratio | Usually 50/50 | Often 70/30 (high VG) |
| Cloud size | Small / discreet | Big clouds |
| Best for ex-smokers | Yes | Less suitable |
How to Pick the Right Strength
If you smoked 20+ cigarettes a day
Start on 20mg nic salts. This matches the nicotine delivery you're used to from cigarettes and disposables.
If you smoked 10–20 a day
10mg or 20mg nic salts. Try 20mg first; drop to 10mg after a month if it feels too strong.
If you smoked fewer than 10 a day
10mg nic salts is enough for most lighter ex-smokers.
If you're vaping for the experience, not nicotine
0mg shortfills or 3mg freebase in a sub-ohm kit. But note: from 1 October 2026 the new vape duty applies to nicotine-free e-liquid too — see our UK vape tax 2026 guide.
What About VG/PG Ratios?
- 50/50 (50% VG, 50% PG) — standard for nic salts. Thinner liquid, smaller clouds, sharper flavour, perfect for pod kits.
- 70/30 (70% VG, 30% PG) — for sub-ohm tanks. Thicker liquid, bigger clouds, smoother throat.
- Shortfills (usually 70/30) — 100ml or 50ml nicotine-free bottles. You add a "nic shot" yourself. Built for bigger kits.
If you're using a pod kit, stick to 50/50 nic salts. High-VG e-liquid is too thick for small pod coils and will cause dry hits and burnt taste.
Our Top Nic Salt Picks at Isle of Vapes
- Vampire Vape Max Nic Salts — £2.24 per 10ml, 4 for £10. Available in 10mg and 20mg, 50/50 VG/PG. Excellent flavour range.
- Browse the full nic salt range at /collections/e-liquids.
Frequently Asked Questions
Are nic salts safer than freebase?
Neither is "safer". Both contain the same nicotine — nic salts just deliver it differently. The smoothness at high strengths is what makes them more suitable for ex-smokers.
Can I use freebase in my pod kit?
Technically yes, but you'll get a harsh throat hit at any strength above 6mg, and a 70/30 freebase will likely flood or starve your coil. We don't recommend it.
Can I use nic salts in a sub-ohm box mod?
Don't. Nic salts at 20mg in a high-wattage device deliver an unsafe amount of nicotine in a single puff. Use 0–6mg freebase shortfills in big kits.
Why is 20mg the maximum strength?
UK TPD regulations cap nicotine at 20mg/ml for any e-liquid sold in the UK.
What's the cheapest legal way to buy nic salts in bulk?
Multi-buy deals. Most reputable UK retailers (including Isle of Vapes) offer 4 bottles for £10. Bulk-buy before 1 October 2026 to beat the new vape duty.
The Bottom Line
If your kit fits in your palm, you want nic salts. If it has a power button and adjustable wattage, you want freebase. Match the strength to your smoking history, stick to 50/50 in a pod kit, and you'll have a smoother experience than any disposable ever delivered.
Stock up before the October 2026 vape tax. Browse our full nic salt range at /collections/e-liquids — 4 for £10 multi-buys, free UK delivery over £20.
For smokers aged 18+. Nicotine is addictive. Last updated June 2026.
