
Salt nic vs. freebase, 5% vs. 0%, and how to choose the right level for you
Most disposable vapes sold in the US in 2026 contain between 20 mg/mL and 50 mg/mL of nicotine - most commonly expressed as a percentage (2% to 5%). The most popular strength across all major brands is 5% (50 mg/mL), which uses nicotine salt (salt nic) technology for a smoother, faster-absorbing hit compared to older freebase nicotine.
If you have ever picked up a Geek Bar, RAZ, Lost Mary, HQD, or FUME device - you were almost certainly vaping at 5% nicotine salt. Here is everything you need to know about what that actually means for your body and how different levels compare.
Nicotine concentration in vapes is listed one of two ways:
So when a device says "50mg" or "5%," those are the same thing. The percentage format is more common on packaging in the US market.
This distinction matters more than the number on the label.
Nicotine salt (salt nic) is the form used in virtually all modern disposable vapes. It is derived from the natural state of nicotine in tobacco leaves and is bonded with an organic acid (usually benzoic acid). The result: a smoother throat hit even at high concentrations, and faster nicotine absorption into the bloodstream. This is why a 5% salt nic disposable feels less harsh than a 5% freebase e-liquid.
Freebase nicotine is the older form, used in most traditional e-liquids and tank systems. At high concentrations it becomes very harsh. That is why most freebase products top out at 1.8% to 3%, while salt nic devices comfortably go to 5%.
Key takeaway: If you are using a disposable vape, you are almost certainly using salt nic - regardless of the brand.
| Brand / Device | Nicotine Strength | Nicotine Type | Puff Count | Available in 0%? |
|---|---|---|---|---|
| Geek Bar Pulse / Pulse X | 5% (50 mg/mL) | Salt Nic | 15,000 / 25,000 | No |
| RAZ TN9000 / DC25000 | 5% (50 mg/mL) | Salt Nic | 9,000 / 25,000 | No |
| HQD Cuvie Bar / Glaze | 5% (50 mg/mL) | Salt Nic | 7,000 / 12,000 | No |
| Lost Mary MT15000 / MT35000 Turbo | 5% (50 mg/mL) | Salt Nic | 15,000 / 35,000 | No |
| FUME Infinity / Ultra | 5% (50 mg/mL) | Salt Nic | 3,500 / 2,500 | No |
| FUME Hookah | 3% (30 mg/mL) | Salt Nic | 1,200 | No |
Note: All products above are intended for adults 21+ only. Availability may vary by state.
Here is a practical breakdown of the four main strength tiers you will encounter:
This is the standard for US disposables. It delivers a strong, satisfying nicotine hit - comparable to about half a cigarette per 10-15 puffs. Ideal for heavy smokers switching from cigarettes or anyone who wants reliable nicotine delivery. Salt nic keeps the throat hit smooth despite the high concentration.
A step down, used in some FUME products and a few specialty lines. Good for people tapering down their nicotine intake, or lighter smokers who found 5% too intense. Still very effective - most vapers notice a difference after switching from 5%.
Less common in the US disposable market but available in some import brands. Closer to what you would find in the EU market (which caps nicotine at 20 mg/mL by regulation). For very light smokers or those actively reducing nicotine dependence.
Zero-nicotine disposables are a niche but growing category. They deliver flavor and vapor without any nicotine - popular for those who have successfully quit nicotine but miss the hand-to-mouth habit, or for social use. Look for labels that say "0mg" or "nicotine-free." Major US brands like Geek Bar and RAZ do not currently offer 0% variants; you will need to look at specialty retailers for these.
This is where things get interesting. When you buy a 5% disposable, how much total nicotine are you actually getting per device?
It depends on the e-liquid capacity:
Your body does not absorb all of that - nicotine delivery efficiency varies based on puff length, temperature, and individual lung capacity. But it gives you a sense of scale: a high-puff-count device like the Lost Mary MT35000 Turbo or RAZ DC25000 contains significantly more nicotine than a smaller starter device.
Nicotine toxicity from vaping is rare but worth understanding. The acute toxic dose for adults is estimated at 30-60 mg of nicotine (ingested), though this is a topic of ongoing research. You cannot reach that level from normal vaping in a single session.
Signs that you may be using more nicotine than your body is comfortable with:
If you experience any of these, take a break and consider stepping down to a lower nicotine concentration. Everyone's tolerance is different, and someone new to nicotine will respond very differently than a long-term smoker.
Use this as a starting guide: