A product (usually juice or broth) that has been concentrated for storage and later reconstituted by adding water; commonly labeled "from concentrate."
このオレンジジュースは濃縮還元なので、水で戻して作られています。
This orange juice is from concentrate, so it's made by reconstituting it with water.
表示を見たら「濃縮還元」と書いてあり、ストレート果汁ではないことが分かった。
When I looked at the label it said "from concentrate," so I knew it wasn't straight (not single-strength) juice.
濃縮還元の果汁は輸送と保存がしやすいという利点がある。
Juice from concentrate has the advantage of being easier to transport and store.