Anecdotally, I had a high tolerance for caffeine and my wife's was low. We did 23andMe together and the results from them predicted exactly that. I used to dr

Anecdotally, I had a high tolerance for caffeine and my wife's was low. We did 23andMe together and the results from them predicted exactly that. I used to drink 2 pots of brewed coffee a day (using an airpot) with no apparent effect. I still drink a lot of coffee but have switched to decaf after noon. One thing I regret is drinking a lot of soda, which is a lot harder on your teeth than coffee. The pH level of coffee is closer to neutral than soda and even some herbal teas. https://www.healthline.com/nutrition/is-coffee-acidic#acidity https://www.healthline.com/nutrition/is-coffee-acidic#acidit... https://www.healthline.com/health/food-nutrition/is-tea-acidic#ph-of-tea https://www.healthline.com/health/food-nutrition/is-tea-acid...