[hcrisp]

I couldn't find any citations that mention molybdenum as a way to increase metabolism of caffeine. However, I found one reference [0] that mentions, "Consumption of broccoli and brassica vegetables in general and absorption of large quantities of vitamin C increase caffeine clearance".

EDIT: It would seem that the vitamin C paper [1] concludes the opposite of what [0] states. "These results indicate that the elimination of caffeine in the elderly is not affected significantly by the concentrations of vitamin C achieved during this study."

    [0] https://www.coffeeandscience.org/health/coffee-and-caffeine/caffeine-and-metabolism
    [1] https://pubmed.ncbi.nlm.nih.gov/7064899/

[TeaBrain]

A limited number of studies suggested tobacco smoking increases the metabolism of caffeine, an effect possibly mediated by caffeine.

"Caffeine metabolism is increased by smoking, an effect mediated by an acceleration in its demethylation (it also increases xanthine oxidase activity) (Parsons and Neims, 1978). Smoking cessation returns caffeine clearance rates to nonsmoking values (Murphy et al., 1988)."

https://www.ncbi.nlm.nih.gov/books/NBK223808/#:~:text=Caffei....