100% Lemon juice. 100% Juice. Use ReaLemon To: Add fresh lemon taste to fish and seafood; Tenderize and flavor meats and poultry; Add a lemony twist to hot and cold beverages; Make a tasty no fat salad dressing; Splash on fruit salad to prevent browning; Replace small amounts of vinegar in recipes. Helpful tip! ReaLemon Works Great On: Clean and freshen cutting boards and coffee pots. The easy alternative to fresh lemons! 1/2 cup ReaLemon = 1/2 cup fresh lemon juice. 3 tablespoons ReaLemon = the juice of 1 medium lemon.