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What is Propylene Glycol or PG? I know pretty much every e-liquid uses it, including EJmix, but what is it again?

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Propylene Glycol is a thick organic liquid with almost no toxicity and the ability to mix and blend with a wide range of organic solvents. Metabolically, PG breaks down into pyruvic acid, acetic acid and lactic acid which are all naturally occurring, and a part of normal metabolic processes. It has been extensively studied and found that even large oral doses over the long term in animals produced no harmful effects. As a result, the FDA classifies it as "generally recognized as safe" for use as a direct food additive in frozen desserts and ice creams. PG is used in hundreds of foods, medicines and alcoholic beverages; it is the vapor-causing agent in concert smoke machines; and is the most widely used e-liquid base along with vegetable glycerin (VG).

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So if I understand it correctly, using and vaping EJmix is perfectly safe?

NO! The only perfectly safe substance to inhale regularly is fresh air :)There are no studies on the long term effects of inhaled glycols as e-cigs and vaporizers are relatively new, and certainly if you don't currently smoke or vaporize we DO NOT encourage that you start. If however, you are a smoker or vaporizer-user [...]

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I've heard in some places that the EJmix can have a plastic taste, is that true?

We've found during taste trials that about 5%-10% of new users react very negatively to the taste of glycols. If you already vape e-cigs or if you are familiar with PG liquids, a negative reaction is much less likely, though there is still an "acquired taste" window of a few days.The truth is whether we [...]

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