This then causes more narrow arteries, creating pressure, which then results in higher blood pressure. Some believe that caffeine blocks a hormone that keeps your arteries at a healthy width. Its still unclear how the caffeine content in green tea or any beverage, in general, raises blood pressure. Test day challenge doses were supplied in capsules containing either lactose or lactose mixed with 250mg of USP caffeine. Subjects were instructed to eliminate all caffeine from their diet during the 2 weeks of the study. During home maintenance, subjects were instructed to take one capsule at 8:00 am, 1:00 pm, and 6:00 pm each day. Home maintenance doses were supplied in bottles of identical gelatin capsules containing either lactose or lactose mixed with 80mg of U.S. The crossover conditions were counterbalanced. The other week involved ingestion of caffeine during home maintenance for 6 days and a 7th day of caffeine lab challenge. In a randomized, 2-week crossover design, subjects consumed a placebo during home maintenance for 6 days and also consumed a placebo on day 7 in the lab. This all happened about an hour after study participants had ingested some coffee with caffeine.ĭon’t Miss: K Fee Verismo Pods Study Design Caffeine Dosing And Compliance Furthermore, caffeine also led to an increased heart rate. Mean arterial blood pressure also increased by a margin of 11%. Study results showed increased systolic blood pressure readings by as much as 17%. A study published in the International Journal of Scientific and Research Publications, Volume 4, Issue 2 of February 2014, concluded that caffeine indeed increased blood pressure. What matters to some, maybe questions surrounding the association between caffeine and blood pressure in as far as if consumption of caffeine could lead to chronic high blood pressure which is also known as hypertension. This is scientifically proven as we shall demonstrate. Caffeine does cause a spike in blood pressure. This relationship between caffeine and hypertension continues to interest both high blood pressure sufferers themselves and hypertension researchers. On the other hand, millions more people are hypertensive. The relationship between caffeine and blood pressure understandably triggers interest because on one hand millions of people consume caffeine from various sources including the obvious one which is coffee. Now, we wont say this justifies hitting up the coffee shop every morning in the name of good health, but at least you can strike that worry off the list. Good news! Caffeine may actually protect you from hypertension! If, on the other hand, you have one of the A variants, or what is known as the fast-metabolizing version, your risk of hypertension may actually be lower. Your risk of hypertension is higher if you consume caffeine. If you are stuck with this, your body metabolizes caffeine slower than normal. The CYP1A2 rs762551 C variant is what is called the slow-metabolizing variant. Depending on your version of it, you are either good to go or youd better be careful. There is one gene specifically responsible for metabolizing caffeine called CYP1A2. Genetics may account for up to 50% of differences in blood pressure. How Do My Genetics Affect Caffeine And Blood Pressure They also provide various health benefits, depending on the herb or plant used to make the tea. That doesnt mean theyre not good for you though! Herbal teas have no caffeine or L-theanine, but they do have antioxidants, vitamins, and minerals. Herbal teas are not part of the same tea family, so theyre not considered true teas. Studies show drinking about two cups of either green or black tea each day can lower your blood pressure.Black tea is highest in caffeine, whereas green tea and the other true teas tend to be lower.They all have L-theanine, a compound that brings about a relaxed, but alert state.However, green tea has more epigallocatechin-3-gallate, whereas black tea is a rich source of theaflavins. They all have polyphenol antioxidants.They simply differ in the way the plant is grown and how the leaves are processed. Green tea tends to get all of the glory, but really, all of these teas are good for you. They all come from the Camellia sinensis plant. True tea includes black and green tea, as well as white, yellow, and oolong teas.
That in itself probably accounts for at least some of its blood pressure reducing action.īut its really the polyphenols in tea that make it so good for your heart and blood pressure. Theres just something about making a cup of tea that makes you pause and relax. Does Caffeine cause High Blood Pressure? â
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