tobacco has caffeine Managing Intake When Quitting Tobacco: Tips and Insights no crash How Old to Buy Caffeine
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Cilurzo et al

nearly 26% of adults smoke in both states

In addition, RPE cells protect photoreceptors from light-induced damage, support the renewal of photoreceptor outer segments by phagocytosis, and execute the visual cycle, to mention a few functions [1]

Schroer, K

Using high-purity butane helps ensure a clean, odorless flame that does not interfere with the cigars rich flavors

Its what makes cigarettes addictive, but it isnt the main reason smoking causes serious health harm, most of that comes from burning tobacco and breathing in the smoke