The authors admit this in the paper. They write: "This is a cross-sectional study, which only allows us to identify associations, not causal relationships."

With their smart chip providing a consistent voltage to the heating element, Cigavette has succeeded where others have failed, and produced an e-cigarette that actually tastes like a tobacco cigarette.

In addition to ensuring basic safety, such regulations would also address issues such as the presence of formaldehyde in some e-cigarette brands and would regulate the product to minimize the known harmful by-products which have been identified in some e-cigarettes. These by-products are avoidable. We know this because some brands on the market (such as Vuse and NJOY) have been tested and shown to have no detectable/quantifiable levels of any hazardous byproducts.

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