Are e cigarette a good substitute for real cigaret

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The acute oral toxicity of propylene glycol is very low, and large quantities are required to cause perceptible health damage in humans; Serious toxicity generally occurs only at plasma concentrations over 1 g/L, which requires extremely high intake over a relatively short period of time.[11] It would be nearly impossible to reach toxic levels by consuming foods or supplements, which contain at most 1 g/kg of PG.
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