What are PG and VG in electronic cigarette juice

PG is the abbreviation of Propylene Glycol, with the Chinese name being Propylene Glycol. Propylene glycol has no odor or color and is less viscous than VG. When atomizing, it is used to provide "throat pain", which some users claim is similar to the feeling when smoking. It also carries essence more effectively than VG, making it the most commonly used suspension of essence concentrate and nicotine.
VG is the abbreviation for Vegetable Glycerin, and its Chinese name is Plant Glycerin. It is a natural chemical substance derived from vegetable oil, so it is safe for vegetarians. It is usually used in electronic cigarette oil to create a "thick" feeling during atomization. VG has a slightly sweet taste and is much thicker than PG. Compared to glycerol, plant glycerol provides a much smoother throat, making it more suitable for Sub Ohm atomizers. Although nicotine and seasoning are usually suspended in PG, some suppliers offer VG alternatives to achieve 100% VG mixing.
8 tips for PG and VG:
PG and VG are odorless liquids, which can be combined with essence and nicotine to make electronic cigarette oil;
Technically speaking, PG and VG belong to the category of alcohol chemistry (although named so, they do not cause intoxication), they are classified as sugar alcohols, and are included in many consumables;
They generate steam when heated, so they can be inhaled;
PG and VG are not fats and do not cause any medical problems that may arise from inhaling actual fats and oils (such as lipoid pneumonia);
The different ratios of the two liquids will result in varying viscosity and slightly different flavors of the tobacco oil;
When used, they have a noticeable sensation in the mouth and throat;
Most modern electronic liquids use a combination of these two liquids, although the proportions may vary greatly;
Some e-cigarette devices can only be used with a certain proportion of PG and VG.
The increase in VG concentration means that it will reduce the lifespan of the atomizer compared to PG based e-liquid. High VG e-liquid will clog the coil faster, making it unable to function properly even in some atomizers. Older products are particularly susceptible to impact, especially models that use smaller coils, such as the Clearomizer. The Nautilus series and eGo tanks are some well-known atomizers that are known to have difficulties in handling high VG fluids.
Like PG, the most common side effects of atomized high VG e-cigarette oil are dehydration: dry mouth, sore throat, and thirst. Similarly, please make sure to drink plenty of water and take a break if necessary.