For many people, it would be fine to drink noni juice on a regular basis. There might be times this would be questionable is if there is an unnatural, and possibly harmful ingredient. For instance, most health-concerned consumers would not wish to drink high fructose corn syrup every day, nor would it be good for you (though many people do it).
most noni juice is completely pure. The main ingredient, of course, being the noni (morinda citrifolia) itself. Noni juice contains high levels of proxeronine, a precurser to xeronine, an alkaloid which is known to actually heal cells. Unfortunately, noni does not taste good on its’ own, so noni juice also contains the ingredients of other juices. Common juices include apple, pear and beet, and it is then sweetened with a natural sweetener; usually honey.