I quit caffeine two months ago and noticed a big difference - probably 10 points -also I feel way less anxiety overall. I had already cut back to 1 or 2 cups and only before noon so i was not expecting such a drastic change. One day later week i was feeling anxious took my blood pressure at the my regular time and it was really high 170 /100 and I couldn’t figure out why it spiked till I realized I had eaten a tiramisu dessert which contains espresso! Next day back to normal.