For the general population of healthy adults, Health Canada advises a daily intake of no more than 400mg. [72] This limit was found to be safe by a 2017 systematic review on caffeine toxicology. [73] Children As seen in the table above, all of the teas listed contain pretty much identical amounts of caffeine. Caffeine in Different Types of PG Tips Tea Drinking between 3–5 cups of coffee per day or more than 3 cups of tea per day may also reduce the risk of brain diseases such as Alzheimer’s and Parkinson’s by 28–60% ( 10, 11, 12, 13).

Some people use caffeine-containing beverages such as coffee or tea to try to treat their asthma. [45] Evidence to support this practice is poor. [45] It appears that caffeine in low doses improves airway function in people with asthma, increasing forced expiratory volume (FEV1) by 5% to 18% for up to four hours. [46]activehours:........xxxxxxxx........ - put 24 . or x characters - which indicate from hour 0 to hour 23 of the day. Caffeine will The brewing temperature doesn’t matter that much; while some purists will claim that pouring boiled water directly on to your coffee grounds will “burn” the flavour, it seems to have little effect on the beneficial compounds inside. Harpaz E, Tamir S, Weinstein A, Weinstein Y. The effect of caffeine on energy balance. Journal of basic and clinical physiology and pharmacology. 2017 Jan 1;28(1):1-0.

Longevity. Drinking coffee may decrease the risk of premature death by as much as 30%, especially for women and people with diabetes ( 39, 40). In one case study, a woman who took a massive dose of caffeine powder and tablets in an attempted suicide developed a very rapid heart rate, kidney failure and other serious health issues ( 40). Interestingly, cortisol levels were similar between regular and less frequent caffeine consumers, suggesting the compound may have the same effect on stress levels regardless of whether you drink it habitually ( 12).

Some analog substances have been created which mimic caffeine's properties with either function or structure or both. Of the latter group are the xanthines DMPX [210] and 8-chlorotheophylline, which is an ingredient in dramamine. Members of a class of nitrogen substituted xanthines are often proposed as potential alternatives to caffeine. [211] [ unreliable source?] Many other xanthine analogues constituting the adenosine receptor antagonist class have also been elucidated. [212] In February 2023, the BBC reported that an investigation had found more than 70 women had been sexually abused on tea farms in Kenya that supply PG Tips. [22] Slogans [ edit ]