noun which may take the genitive case particle 'no', noun
containing no fruit juice; fruit-juice-free
Used on labels and in descriptions of drinks, candies, and other products to indicate that they contain no actual fruit juice. Often seen in the phrase 無果汁飲料 (fruit-juice-free beverage).
このジュースは無果汁です。
This juice contains no fruit juice.
無果汁飲料は果汁が入っていない。
Fruit-juice-free beverages contain no fruit juice.
無添加 means 'additive-free', a broader term for products without artificial additives, while 無果汁 specifically refers to the absence of fruit juice.
Compound of 無 (mu, 'without') and 果汁 (kajū, 'fruit juice'). The reading むかじゅう follows standard on'yomi readings.