Organic Cook Islands Noni Juice 500ml. 100% pure Morinda citrifolia juice. Noni is a fruit (Morinda citrifolia). Among Polynesian healers, the fruit of the Noni plant has a reputation as a medicinal food. Islanders have used Noni as a powerful natural product for thousands of years. Noni gives us the nutrients the body needs while stimulating the immune system, regulating cell function, cellular regeneration of damaged cells whilst improving overall vitality.