I used them heavily in college, then less in my early professional life, then more heavily when I had very young kids, now back to what feels like a reasonable

I used them heavily in college, then less in my early professional life, then more heavily when I had very young kids, now back to what feels like a reasonable 100mg caffeine + 200mg L-theanine a day. My life improved significantly when I realized that I was drinking soda, energy drinks, or coffee for the caffeine, not the taste or "nutrition": they're all extremely acidic, and some are extremely sugary. Instead of drinking my drugs, I drink from a water bottle and take a slow-release pill each morning with my multivitamin.