My tolerance has changed a lot going from my early 20's to my late 20's. I used to regularly drink 8 cups a day, but now start to feel awful after 2. I think i

My tolerance has changed a lot going from my early 20's to my late 20's. I used to regularly drink 8 cups a day, but now start to feel awful after 2. I think its a combination of losing the acquired tolerance, increasing a latent sensitivity, and more awareness of my physiology.