A 100 g portion of fresh elephant grass samples will
meet over 200% of this requirement; they are thus
exceptionally rich plant sources of riboflavin.
Although the RDA for riboflavin for adults is
1.3 mg/day for men and 1.1 mg/day for women,
the median intake of riboflavin from food in the
United States was estimated to be approximately 2
mg/day for men and 1.5 mg/day for women and
the ninety-fifth percentile of U.S. intake from
both food and supplements ranged from 4 to 10
mg/day. There has been no evidence of adverse
effects for consuming more than the RDA in these
populations (Institute of Medicine, 1998).