I drank Diet Coke daily for 25 years—then stopped: A Harvard nutritionist says I did my brain ‘a favor’

For decades, drinking a Diet Coke every day gave me a burst of caffeine and satisfaction.

I started popping cans of the stuff in the late 1990s, when I was a teenager. It made me feel like an adult. Once I was a proper adult, refusing to quit — no matter how many people told me I should — made me feel young.