1987 年 51 巻 12 号 p. 3281-3286
Caffeine and caffeine-containing beverages (instant coffee, black tea, green tea, or oolong tea) caused a significant decrease in serum tryptophan, and significant increases in brain tryptophan, serotonin, and 5-hydroxyindole acetic acid over those in rats fed a control diet. Adenosine supplementation partially counteracted the increase of brain serotonin caused by caffeine. These results are interpreted as indicating that caffeine-containing beverages may have some nutritional and behavioral effects.
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