PROBLEM TO BE SOLVED: To provide a carbonated beverage having a new flavor by using a polyphenol component of guava leaf extract in order to improve fizziness during drinking of various carbonated beverages and making a drinker not feel a peculiar flavor characteristic of polyphenol of guava leaf extract and a means for favorably taking polyphenols having excellent healthy effects such as hyperglycemia prevention, reduction effects on lipid metabolism inhibition, etc.SOLUTION: The carbonated beverage having excellent fizziness that contains a polyphenol component of guava leaf extract characterized by adding essence of guava leaf extract containing ≥50% of polyphenol component of guava leaf extract adjusted to have water-solubility to a carbonated beverage and polyphenol component of guava leaf extract adjusted to have water-solubility are subdivided and packaged polyphenol component of guava leaf extract so as to contain a prescribed amount of polyphenol component of guava leaf extract, wherein the packaged essence of guava leaf extract is characterized by adding the essence of guava leaf extract to a usual carbonated beverage containing no polyphenol component of guava leaf extract to improve fizziness of carbonated beverage.COPYRIGHT: (C)2012,JPO&INPIT【課題】 グァバ葉抽出ポリフェノール成分を各種炭酸飲料の飲用時における発泡性向上に役立てて、グァバ葉抽出ポリフェノールの独特の癖のある味わいを感じられないものとすることで新しい味わいの炭酸飲料と、高血糖予防及び脂質代謝阻害低減効果など優れた健康効果のあるポリフェノールをより好適に摂取する手段を提供する。【解決手段】 炭酸飲料に水溶性に調整したグァバ葉抽出ポリフェノール成分が50%以上含まれるグァバ葉抽出エキスを加えてなることを特徴とするグァバ葉抽出ポリフェノール成分を含む発泡性に優れた炭酸飲料及びこの水溶性に調整したグァバ葉抽出ポリフェノール成分を所定量含むようにグァバ葉抽出エキスを小分けして容器詰めし、該グァバ葉抽出エキスをグァバ葉抽出ポリフェノール成分を含まない通常の炭酸飲料に加えて炭酸飲料の発泡性を向上させることを特徴とする容器詰めしたグァバ葉抽出エキス。【選択図】図1