It is also relevant to point out that the slight increase in blood pressure levels attributable to coffee is not larger than that experienced during common activities such as taking part in a conversation (19). A recent study (20) examined the association between caffeine intake and incident hypertension in a cohort of 155,594 women in the United States.
Caffeine intake and possible confounders were ascertained from regularly administered questionnaires. In this large cohort habitual coffee consumption WAS NOT associated with an increased risk of hypertension, but consumption of sugared or diet cola was associated with it.
On thier website, the UK based Blood Pressure Association, in answer to a question ‘Does drinking too much coffee raise your blood pressure?’ state that ‘Drinking coffee only has a small effect on blood pressure and therefore cutting down or stopping will not lower it. Other parts of your diet, such as the amount of salt or fruit and vegetables you eat are much more likely to have an effect on your blood pressure, so concentrate on getting these right’.
Further, in 2008, and extensive review of both cross-sectional and prospective studies concluded that ‘Although the precise nature of the relation between coffee and blood pressure is still unclear, most evidence suggests that regular inrtake of caffeinated coffee does not increase the risk of hypertension’. (21)
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