Journal
AMERICAN JOURNAL OF CLINICAL NUTRITION
Volume 98, Issue 6, Pages 1700S-1708SPublisher
AMER SOC NUTRITION-ASN
DOI: 10.3945/ajcn.113.058248
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Funding
- American Cancer Society
- American College of Nutrition
- American Institute for Cancer Research
- American Medical Women's Association
- American Society for Nutrition
- Linus Pauling Institute
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Tea has historically been associated with mood and performance benefits, such as relaxation and concentration. This review summarizes the research on the acute effects of tea, and its ingredients theanine and caffeine, on attention and mood. Consistent with abundant research on the benefits of caffeine, the performance benefits of tea were identified in a number of studies, with particularly consistent evidence for improved attention. Tea consumption also consistently improved self-reported alertness and arousal, whereas effects on pleasure or relaxation were less consistent. In addition to the research on caffeine in real-life performance, 2 recent studies have provided a broader perspective on tea's effects on psychological function in that they showed beneficial effects in related areas such as work performance and creativity. These studies showed the validity of laboratory findings by supporting the idea that tea consumption has acute benefits on both mood and performance in real-life situations.
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