>>11267104In theory, smoking increases oxidative stress directly through the compounds contained in tobacco smoke. Alcohol increases oxidative stress during its metabolization, where reactive oxygen is released. It's generally accepted that those compounds accelerate physical aging processes.
>minimum level of consumption/smoking to prevent these effectsZero if you want to be on the safe side. It's not even proven whether external supply of antioxidants can even out the oxidative damage. Otherwise, you can try supplementing copious amounts of Vitamin C.
