benzene in e cigarettes Source: https://hub.jhu.edu/2021/10/07/vaping-unknown-chemicals E-Cigarettes & Vaporizers - NeedyMeds

The link between smoking and deteriorating health problems, particularly lung cancer, only became widespread in 1964 when US Surgeon General Luther Terry published a report on smoking and health

Worse, the nutrition profile wasn't even necessarily improved, despite the alleged harmfulness of beef tallow insisted upon by Phil Sokolof's campaign because both seed oils and beef tallow have pros and cons

Moreover, educational attainment has been a widely used proxy for social disadvantage in previous studies and it is less prone to endogeneity bias from reverse causality (smoking effecting educational attainment) than measure such as income

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