A deficiency of riboflavin can be primary - poor vitamin sources in one's daily diet - or secondary, which may be a result of conditions that affect absorption in the intestine, the body not being able to use the vitamin, or an increase in the excretion of the vitamin from the body.
Substantial evidence means more than a mere scintilla. It means such relevant evidence as a reasonable mind might accept as adequate to support a conclusion.. Richardson v. Perales, 402 U.S. 389, 401 (1971).
Test for Relevant Evidence. Evidence is relevant if: (a) it has any tendency to make a fact more or less probable than it would be without the evidence; and. (b) the fact is of consequence in determining the action.est for Relevant Evidence. Evidence is relevant if: (a) it has any tendency to make a fact more or less probable than it would be without the evidence; and. (b) the fact is of consequence in determining the action.