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).
There are several types of evidence that may be used in a court setting. Evidence can be direct or circumstantial. Direct evidence is the items in a court case that can be seen or certain types of eyewitness testimony. Circumstantial evidence is usually a series of events or characterization that implies guilt. All the facts that are collected for a court case are tied together to help a judge or jury make a decision to convict or not to convict someone on trial.