BUT. I then discovered the quantity was going to make a difference after all, with regards to meditation; and not just quantity, but type. I learned that coffee made in a French press at home was not as intense on my system. I could drink a small cup and proceed with my yoga and meditation. However, going to Starbucks for an espresso or Americano - any size - had to be sipped in small quantities before meditation, and then snorted, pulled through a straw, mainlined through a vein (not really, but you get the idea), whatever it took, to get the stimulant into the body. Ahhhhhh.