<prompt> The symptoms of dietary deficiency of niacin which results in pellagra will be less severe if the diet has a high content of:TryptophanTyrosineThymineThiamine  <response>: a. TryptophanRef: Nelsons 20e p 325, Ghai 8e p 118Tryptophan can be converted to nicotinamide adenine dinucleotide NAD 60mg tryptophan gives rise to 1mg niacin. 