What Is E-Liquid? Ingredients, Nicotine Strengths, and How to Choose

E-liquid (also called e-juice or vape juice) is the liquid that a vape device heats into vapor. It is made from a small set of ingredients — propylene glycol (PG), vegetable glycerin (VG), nicotine (optional), and flavorings — and it is sold in different nicotine strengths and PG/VG ratios so users can match it to their device and preference. If you are new to vaping, the three decisions that matter most are: what nicotine strength to start with, what PG/VG ratio suits your device, and how to buy and store it legally and safely. Note that purchasing and using e-liquid requires you to be 21 or older, and retailers like ECBlend Flavors require age verification before you can buy.

E-liquid vs. e-juice vs. vape juice: same thing

These terms are used interchangeably across the industry. "E-liquid" and "e-juice" both refer to the same product; "vape juice" is a more casual term for the same liquid. You will see all three on product pages, and a store may use them in different places without meaning anything different. When you are comparing products, treat them as synonyms and focus instead on the specs that actually change your experience: ingredients, nicotine strength, and PG/VG ratio.

The core ingredients

Most e-liquids contain four categories of ingredients:

Some products are marketed as "tobacco free" e-liquid, meaning the nicotine (if present) is not derived from tobacco. ECBlend, for example, lists a "Tobacco Free E-Liquid" line alongside its custom mixing options.

PG and VG: what the ratio changes

PG and VG are the two base liquids, and the ratio between them is one of the biggest factors in how a vape feels:

• Higher PG — thinner liquid, stronger throat hit, more flavor carry, less visible vapor. Often chosen by people who want a cigarette-like sensation or who use low-power devices.
• Higher VG — thicker liquid, smoother inhale, more vapor production. Often chosen for sub-ohm or higher-power devices.
• Balanced ratios (for example, an even split) — a middle ground between throat hit and vapor.

The right ratio depends on your device. Very thick, high-VG liquid can wick poorly in some low-power or small-coil devices, while very thin, high-PG liquid can be harsh in high-power setups. If you are unsure, a balanced ratio is the safer starting point.

Nicotine strength: mg/mL and percentage

Nicotine strength tells you how much nicotine is in the liquid. It is expressed two ways:

• mg/mL (milligrams per milliliter) — the most common labeling in the U.S. A "6mg" liquid contains 6 mg of nicotine per mL.
• Percentage — often used for higher-strength liquids. A 3% liquid is roughly 30 mg/mL; a 5% liquid is roughly 50 mg/mL.

ECBlend's product listings show strengths ranging from 3mg through 36mg, which gives you a sense of the spread available. As a general starting framework:

• Lower strengths (3–6 mg/mL) — commonly used with higher-power devices that produce more vapor per puff.
• Mid strengths (12–18 mg/mL) — often used with lower-power or mouth-to-lung devices.
• Higher strengths (24–36 mg/mL and above) — used in small, low-output devices; a little goes a long way.

Higher strength is not "better" — it delivers more nicotine per puff, so the goal is to match strength to how much vapor your device produces. If you are switching from smoking, many people start at a mid strength and adjust. If you have never used nicotine, the safest choice is not to start.

How to choose: a practical starting point

1. Identify your device type. Low-power, mouth-to-lung devices generally pair with higher PG and higher nicotine. Higher-power, sub-ohm devices generally pair with higher VG and lower nicotine.
2. Pick a PG/VG ratio that matches that device. Balanced if unsure.
3. Choose a nicotine strength in the band that fits your device and your nicotine tolerance.
4. Choose flavors you expect to enjoy — this is the most subjective part, and small bottles let you test before committing.
5. Check the label for the strength and ratio before you buy, since the same flavor may come in several configurations.

ECBlend also offers a Create Your Own E-Liquid option where you select up to four flavors and set a percentage for each, up to a total of 100%. This is useful if you already know what you like and want to fine-tune it, but it is not the easiest starting point for a first purchase.

Safety, storage, and legal requirements

• Age requirement. You must be 21 or older to purchase or use these products. ECBlend requires age verification, and once your account is verified you will not see the prompt again unless your account changes in a way that affects verification status. Selling or reselling to minors is illegal.
• Storage. Keep e-liquid out of reach of children and pets, in its original labeled container, away from heat and direct sunlight. Nicotine-containing liquid is a hazard if swallowed or spilled on skin — treat it like any nicotine product.
• Handling. Avoid contact with eyes and skin, and do not use damaged or unlabeled bottles.
• Buying. Purchase from retailers that verify age and publish ingredient and strength information, so you know what you are getting.

Quick answers to common beginner questions

Is e-liquid the same as e-juice? Yes — the terms are interchangeable.

Does all e-liquid contain nicotine? No. Nicotine-free options exist, and some lines are marketed as tobacco free.

What does 3mg mean? 3 milligrams of nicotine per milliliter of liquid.

What ratio should I start with? A balanced PG/VG ratio is a reasonable default if you do not yet know your device's preference.

Can I mix my own? Yes — ECBlend offers custom mixing where you select flavors and percentages, with a separate flavor concentrate option if you want to mix from scratch.