Caffeine content of common beverages.

@article{Bunker1979CaffeineCO,
  title={Caffeine content of common beverages.},
  author={Manzer L. Bunker and Margaret Mcwilliams},
  journal={Journal of the American Dietetic Association},
  year={1979},
  volume={74 1},
  pages={
          28-32
        }
}
Tea, coffee, carbonated and chocolate beverages were analyzed for caffeine, and results compared in terms of usual serving sizes. Significant differences in caffeine levels were found to result from the preparation method of coffee or brewing time of tea. It is possible for a cup of tea, instant coffee, or can of cola beverage to have similar caffeine content (55 to 65 mg.); however, the mean values per cup of black tea (28 to 46 mg.) are considerably lower than for brewed coffee (107 to 151 mg… 
Variability in caffeine consumption from coffee and tea: possible significance for epidemiological studies.
TLDR
Variations in caffeine concentrations and in the volume of coffee consumed have frequently been ignored in examinations of the possible relationship between coffee consumption and various health problems, and this could perhaps partly explain some conflicting results seen in epidemiological studies.
Caffeine content in coffee as influenced by grinding and brewing techniques
Abstract The caffeine content of coffee as influenced by various coffee preparation methods was investigated. The variables studied included the coffee solids to water volume ratio, the volume of
Caffeine content of prepackaged national-brand and private-label carbonated beverages.
TLDR
Most store-brand carbonated beverages were found to contain less caffeine than their national-brand counterparts, indicating that consumers would benefit from the placement of caffeine values on food labels.
Evaluation of the Caffeine Contents in Tea and Coffee by HPLC and Effect of Caffeine on Behavior in Rats
Different studies have been conducted regarding caffeine as psychostimulant drugs and its effects as well as determination in various materials. Since, coffee and tea are most drinkable beverage in
Psychophysiological Aspects of Caffeine Consumption
TLDR
Research on caffeine's effects on alcoholic drinks, alertness, anxiety, heart rate, performance, and sleep is reviewed.
Caffeine: Is it Dangerous to Health?
  • R. Watson
  • Medicine
    American journal of health promotion : AJHP
  • 1988
TLDR
Individuals should moderate or eliminate their intake of major caffeine-containing foods, beverages, and drugs, since the substance has widespread effects on many body systems.
Nutrition Caffeine: Is It Dangerous to Health?
TLDR
Individuals should moderate or eliminate their intake of major caffeinecontaining foods, beverages, and drugs, since the substance has widespread effects on many body systems.
Caffeine Consumption Habits of New Zealand Tertiary Students
TLDR
Tertiary students may be at increased risk of consuming excessive amounts of caffeine due to seeking caffeinated products with well-known wakefulness effects and cognitive benefits, and public health initiatives directed at tertiaryStudents may be important to reduce potential caffeine-related harm.
Human coffee drinking: manipulation of concentration and caffeine dose.
TLDR
Examination of total daily coffee and caffeine intake across experiments, however, provides no evidence for precise regulation of coffee or caffeine intake.
Tea preparation and its influence on methylxanthine concentration
The amount of tea or coffee estimated from the number of cups consumed is frequently used as an indication of caffeine consumption in epidemiologic studies. However, this alone may be an inadequate
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 20 REFERENCES
Caffeine content of beverages as consumed.
TLDR
If tea and coffee as drunk contain less caffeine than generally supposed, the potency of caffeine may be greater than commonly realized, as may the relative caffeine content of certain commercial preparations, including chocolate and colas.
Response of free fatty acids to coffee and caffeine.
TLDR
The administration of sucrose significantly reduced the immediate FFA response and the FFA effects with decaffeinated coffee were markedly less than with regular coffee and were similar to that of the control beverage.
Physiologic and psychotropic effects of caffeine on man. A review.
TLDR
Caffeine content of coffees, teas, cola drinks, cocoa, and drugs is summarized and symptoms of caffeinism, caffeine withdrawal, and caffeine-drug interactions are described.
Effects of coffee ingestion on oral glucose tolerance curves in normal human subjects.
TLDR
It is possible that coffee ingestion reduced the peak postprandial blood glucose levels by mobilizing a hormone from the gastrointestinal tract such as secretin, pancreozymin, or the newly discovered substance with glucagon-like immunoreactivity described by Unger et al37.
EFFECT OF TEA ON GASTRIC SECRETIONS AND MOTILITY
TLDR
This study was undertaken to investigate by objective methods the effects of tea on digestion and on various associated physiological processes.
Gastric acid secretion and lower-esophageal-sphincter pressure in response to coffee and caffeine.
TLDR
The data suggest that clinical recommendations based upon the known gastrointestinal effects of caffeine may bear little relation to the actual observed actions of coffee or decaffeinated coffee.
The fate of caffeine in man and a method for its estimation in biological material.
TLDR
A sensitive method for the estimation of caffeine in biological material is described and it is shown that although a considerable amount of caffeine accumulates in the body of moderately heavy coffee drinkers during the day, there is no day to day accumulation of the drug.
Anxiety or caffeinism: a diagnostic dilemma.
  • J. Greden
  • Medicine
    The American journal of psychiatry
  • 1974
The author reports that high intake of caffeine ("caffeinism") can produce symptoms that are indistinguishable from those of anxiety neurosis, such as nervouness, irritability, tremulousness,
Caffeine intoxication: a case of paroxysmal atrial tachycardia.
TLDR
The importance of considering this and other less frequent conditions as potential causes for this arrhythmia is stressed.
Coffee drinking and peptic ulcer disease.
  • Medicine
    Nutrition reviews
  • 1976
...
1
2
...