[Off - List] RE: Caffeine Question

[Guest guest]

[Off - List] RE: Caffeine Question

Al:

You are one of the smartest. And you have common

sense and practical wisdom to share besides.

That proves that you are smart. Thanks Al.

I find much useful wisdom and treasure in your messages.

-- Warren

> On Friday, August 09, 2002 1:57 AM, Alan Pater [sMTP:apater@...] wrote:

> Hi All,

>

> The article is below. I thought 500 mg was quite a lot of caffeine.

> ... Caffeine (mg/oz) ... Hot cocoa, 0.3-3; Coca-Cola, 4, ; Milk chocolate, 1

> to 10; Tea, 3.2-10.7/oz; Instant coffee, 10-17; Drip or brewed coffee,

> 13-30; Espresso, 45-55; One slice chocolate cake, 20 to 30 mg; Anacin or

> Midol, 32 mg/pill; Excedrin, 65 mg/pill; NoDoz 100 mg/pill ...

>

> Cheers, Al.

>

> Psychosom Med 2002 Jul-Aug;64(4):595-603

> Caffeine affects cardiovascular and neuroendocrine activation at work and

> home.

> Lane JD, Pieper CF, -Bute BG, JE, Kuhn CM

>

> " OBJECTIVE: This study investigated the effects of moderate doses of

> caffeine on ambulatory blood pressure and heart rate, urinary excretion of

> epinephrine, norepinephrine, and cortisol, and subjective measures of stress

> during normal activities at work and at home in the evening. METHODS:

> Healthy, nonsmoking, habitual coffee drinkers (N = 47) participated in 3

> days of ambulatory study. After a day of ad lib caffeine consumption,

> caffeine (500 mg) and placebo were administered double-blind in

> counter-balanced order on separate workdays. Ambulatory blood pressure and

> heart rate were monitored from the start of the workday until bedtime.

> Urinary excretion of catecholamines and cortisol was assessed during the

> workday and evening. RESULTS: Caffeine administration significantly raised

> average ambulatory blood pressure during the workday and evening by 4/3 mm

> Hg and reduced average heart rate by 2 bpm. Caffeine also increased by 32%

> the levels of free epinephrine excreted during the workday and the evening.

> In addition, caffeine amplified the increases in blood pressure and heart

> rate associated with higher levels of self-reported stress during the

> activities of the day. Effects were undiminished through the evening until

> bedtime. CONCLUSIONS: Caffeine has significant hemodynamic and humoral

> effects in habitual coffee drinkers that persist for many hours during the

> activities of everyday life. Furthermore, caffeine may exaggerate

> sympathetic adrenal-medullary responses to the stressful events of normal

> daily life. Repeated daily blood pressure elevations and increases in stress

> reactivity caused by caffeine consumption could contribute to an increased

> risk of coronary heart disease in the adult population. "

>

> PMID: 12140349 [PubMed - in process]

> -----Original Message-----

> From: somejoanne2002 [mailto:bhsnz@...]

> Sent: Thursday, August 08, 2002 11:27 PM

>

> Subject: [ ] Re: Caffeine Question

>

>

> The effect of caffeine on health seems a complex issue that is not

> yet completely sorted out. There has been a recent study that shows

> caffeine stays in the blood for many hours and that it can increase

> feelings of stress. An article on this study is at:

>

> http://www.healthscout.com/template.asp?

> page=newsdetail & ap=43 & id=508370

>

> This jibes with my subjective experience and so I don't consume

> caffeine on a regular basis (only occasionally). Nor do I feel the

> need for it on a regular basis. However recent posts on caffeine

> have also shown it to be beneficial for preventing Alzheimers. So if

> you like caffeine and it doesn't stress you out too much ... it may

> not be such a bad thing.

>

> Excerpt from the above article:

>

> " Stressed out? Try kicking caffeine for a week, and you will see your

> blood pressure, adrenaline levels and overall stress drop, according

> to a study by Duke University Medical Center.

>

> The new research found that the effects of caffeine stay in the body

> all day long, amplifying any feelings of stress. Moreover, the

> perception of stress increased for the 47 study participants after

> they took caffeine tablets.

>

> " On the day they had caffeine, their blood pressure was higher

> throughout the day. And we also found that adrenaline goes up by

> about 32 percent, " says lead researcher D. Lane, who has

> studied caffeine for 15 years. " The measurable effects of drinking

> four cups of coffee are the difference between working a stressful

> job at a hospital and spending the day at home

>

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