Carrots are an great source of vitamin A in the form of beta carotene. They are also an excellent source of B vitamins, vitamin K and potassium. The carrot juice is sweet, and pairs well with apples. 1 large apple quartered 1/2 cup pineapple chunks (Optional) 2 large carrots 2 pieces fresh ginger Wash all the weight loss juice ingredients well and pat dry. Cut fruit and vegetables into 1-2 inch chunks.