Noni fruit powder is high in carbohydrates and dietary fiber. According to the College of Tropical Agriculture and Human Resources at the University of Hawaii at Mānoa, a 100 g sample of the powder contains 71% carbohydrate and 36% fiber. The sample also contained 5.2% protein and 1.2% fat.[4]
These macronutrients evidently reside in the fruit pulp, as noni juice has sparse amounts of macronutrients.[5]
The main micronutrients of noni pulp powder include 9.8 mg of vitamin C per 1200 mg sample, as well as 0.048 mg niacin (vitamin B3), 0.02 mg iron and 32.0 mg potassium.[4] Vitamin A, calcium and sodium are present in moderate amounts.
When noni juice alone is analyzed and compared to pulp powder, only vitamin C is retained at a high level, 33.6 mg per 100 g of juice.[5]
Although the most significant nutrient feature of noni pulp powder or juice is its high vitamin C content, noni fruit juice provides only about half the vitamin C of a raw navel orange.[6] Sodium levels in noni juice (about 3% of DRI)[4] are high compared to an orange. Although the potassium content appears relatively high for noni, this total is only about 3% of the Recommended Dietary Allowance and so would not be considered excessive. Noni juice is otherwise similar in micronutrient content to a raw orange.[6]
Noni fruit contains a number of phytochemicals, including lignans, oligo- and polysaccharides, flavonoids, iridoids, fatty acids, scopoletin, catechin, beta-sitosterol, damnacanthal, and alkaloids. Although these substances have been studied for bioactivity, current research does not conclude anything about their effects on human health.[7]