What is the difference between PG and VG liquids?

difference liquids PG VG
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What is the difference between PG and VG liquids?

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Propylene glycol (PG) is a petroleum based liquid while vegetable glycerin (VG) is made from vegetable oil, usually palm or coconut. PG has a natural bitter taste and needs flavorings to cover it while VG has a natural sweet taste and can be used without any additives. VG has a much thicker viscosity and requires another liquid, usually water, to reduce it.

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