New Delhi, Dec. 13 -- For many of us, tea and coffee are more than just beverages, they are morning rituals, mid-day pick-me-ups, or moments of relaxation. Whether it is green tea and black tea or coffee, each of them have their loyal fans who swear by their benefits. But do these drinks really impact your heart, blood sugar, or focus right after you drink them?

A recent study tried to answer this question. About 40 healthy young women were given a cup of green tea, black tea, coffee, or just warm water over three days. Their heart rate, blood pressure, and blood sugar were monitored for an hour after drinking.

The results? No major changes. One cup of green tea, black tea, or coffee didn't spike heart rate, blood pressure, or blood sug...