The following information was taken from the Wikipedial Page on the Açai Berry. Check the Wikipedia Page for citations of the research.
Most of the research to date on açaí has focused on a particular freeze-dried form referred to as Opti-açaí. This powder preparation of freeze-dried açaí fruit pulp and skin was reported to contain (per 100 g of extract) 533.9 calories, 52.2 g carbohydrates, 8.1 g protein, and 32.5 g total fat. The carbohydrate portion included 44.2 g of fiber. The powder was also shown to contain (per 100 g): negligible vitamin C, 260 mg calcium, 4.4 mg iron, and 1002 U vitamin A, as well as aspartic acid and glutamic acid; the amino acid content was 7.59% of total dry weight.
Açaí has an exceptional content of fats, including oleic acid (56.2% of total), palmitic acid (24.1% of total), and linoleic acid (12.5% of total), and also contains a high amount of beta-sitosterol (78–91% of total sterols). These oil compartments in açaí fruit harbor dense contents of polyphenols such as procyanidin oligmers and vanillic acid, syringic acid, p-hydroxybenzoic acid, protocatechuic acid, and ferulic acid which were shown to degrade substantially during storage or exposure to heat.