10/12/2023 0 Comments Caffeine and blood pressure![]() ![]() However, persons at risk for hypertension may be more vulnerable to the BP effects of caffeine.īonham GS, Leaverton PE: Use Habits Among Adults of Cigarettes, Coffee, Aspirin, and Sleeping Pills, DHEW Publication No. Though caffeine drinkers may exhibit acute increases in BP, the long-term effects appear to be minimal. Tolerance to the cardiovascular effects of caffeine has reliably been reported however, overnight abstinence may be sufficient to negate tolerance effects to most levels of caffeine ingestion in typical caffeine users. Heart rate data are less consistent, possibly due to the different ways HR is measured. Synergistic effects which might pose a more serious risk are rarely found. Experimental laboratory studies have generally found that caffeine produces acute rises in systolic and diastolic BP that are additive to any stress-induced increases. Results from epidemiological studies are inconsistent. Tolerance to caffeine, family history of hypertension, borderline hypertension, and hypertension are also examined as potential moderators. This review surveys research concerning the effects of caffeine on BP and heart rate (HR). Want more tips about how to live well based on science? Catch up with Lily's Life Hacks on ABC iview.Concerns have been raised frequently about caffeine’s potential for increasing blood pressure (BP) and posing a risk for cardiovascular disease. "It might be that people who drink coffee are more likely to walk down to the local coffee shop." The question is whether the beneficial effect is due the coffee or something else entirely, Dr Musgrave points out. "Caffeine increases metabolism but none of the weight loss products with coffee extract actually work," Dr Musgrave says.Īnd associations between coffee drinking and lower rates of diseases like Parkinsons and Alzheimers' disease are equally fraught. In general the evidence linking coffee with appetite control is equivocal. The same goes for any link between coffee and weight loss. "For some people it will make no difference at all and for others it may be helpful."Īnd apart from fitting in with body clocks, the best time for coffee may well be determined by the benefit you feel you get by drinking it.īeyond staying awake, we might prefer to drink coffee to focus on work, as a social ritual with others, or as a pick-me-up after lunch.īut there's also some suggestion the combination may have health benefits.įor example, research has found drinking French press or Turkish coffee with dark chocolate leads to greater absorption of antioxidants in both, than when both are consumed separately.īut as to whether this really translates to better health will depend on someone's whole dietary pattern, Dr Mantzioris says. "The theory is cortisol carries you through that initial couple of hours after you wake up," Dr Mantzioris says.Īnd so the perfect time to have a coffee is mid-morning, once your cortisol levels have dropped off.Ĭaffeine also interacts with a chemical called adenosine, which is involved in energy production.Īdenosine can trigger a process that makes us drowsy when it binds to cells in our bodies – and this may be more likely to happen later in the morning.Ĭaffeine can stop this binding process, so it may be best to delay your coffee until you start to get that sleepy feeling.īut Dr McGuire says there are many factors that can determine whether drinking at a particular time of day makes a difference.
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