![]() ![]() People often develop a “caffeine tolerance” when taken regularly, which can reduce its stimulant effects unless a higher amount is consumed. During the third trimester of pregnancy, caffeine can remain in the body for up to 15 hours. Smoking speeds up the breakdown of caffeine, whereas pregnancy and oral contraceptives can slow the breakdown. It can remain in the blood anywhere from 1.5 to 9.5 hours, depending on various factors. Therefore, drinking your morning coffee on an empty stomach might give you a quicker energy boost than if you drank it while eating breakfast.Ĭaffeine is broken down mainly in the liver. Food or food components, such as fibers, in the gut can delay how quickly caffeine in the blood peaks. Caffeine in beverages such as coffee, tea, and soda is quickly absorbed in the gut and dissolves in both the body’s water and fat molecules. ![]() Caffeine is absorbed within about 45 minutes after consuming, and peaks in the blood anywhere from 15 minutes to 2 hours. The chemical name for the bitter white powder known as caffeine is 1,3,7 trimethylxanthine. Read on to learn more about sources of caffeine, and a review of the research on this stimulant and health. Of course, coffee is not the only caffeine-containing beverage. One reason may be that it supplies us with a jolt of caffeine, a mild stimulant to the central nervous system that quickly boosts our alertness and energy levels. So, three cups of coffee in Italy might be the equivalent of one regular-sized Starbucks in the States,” says Anais Hausvater, MD, a cardiologist at NYU Langone Health in New York City.Many of us can’t imagine starting the day without a cup of coffee. Importantly, this study was performed in Italy, where a single coffee is a fraction of the size of a standard American coffee. “While this study does make a compelling argument for the benefits of coffee, it is very important to understand its limitations before reaching for that third cup. Lifestyle habits that could impact upon blood pressure were also not recorded or addressed. Based on cultural norms among people in North Italy, the researchers assumed that caffeinated coffee was always the participants' brew of choice, rather than decaf, but this was not confirmed. Neither were brewing methods, or bean origins. For example, coffee cup size per drink was not accounted for. In addition to reporting these findings, study authors were quick to note the omissions in data that might color their results. Filtering removes substances and oils, such as cafestol and kahweol, that have been linked to high cholesterol and heart disease (sorry, filter-free French press lovers). Back in the day, old-school brewing was typically done with a percolator instead of a coffeemaker containing a filter. This may have as much to do with brewing methods, as it does with the beverage itself. Could lowering blood pressure be one of coffee’s benefits? Blood pressure, heart health, and coffee: What the research saysĭecades-old studies typically found that coffee wasn’t a healthy choice for cardiovascular health. ![]() But a new study, published in Nutrients, found the opposite to be true. The conventional wisdom has been that it significantly raises blood pressure levels, at least temporarily. But if you’ve ever felt that second (or third, or fourth) cup give you a case of the jitters, you may have wondered what coffee’s effect is on blood pressure, as well as on overall heart health. At over 2 billion cups consumed daily, coffee just may be the world’s favorite beverage.
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