Cross-sectional dietary deficiencies among a prison population in Papua New Guinea

... dietary data, median intakes of calcium (137 mg), potassium (677 mg), magnesium 182 mg), riboflavin (0.308 mg), vitamin A (54.1 mug), vitamin E (1.68 mg), vitamin C (5.7 mg) and folate (76.4 mug) were found to be below estimated average requirements ...

http://www.biomedcentral.com/1472-698X/13/21/abstract