The Effect of Calcium Pantothenate and Para-Aminobenzoic Acid on Gray Hair in Man September 1944 in “ The American Journal of the Medical Sciences ” Harold Brandaleone, E. R. Main, J. MURRAY STELLE We don't know much about this study yet. We're maintaining the world's largest resposity of hair loss research. You can help out the community by sending a PDF of this study here . Not sure how to get a study's PDF? You can email the authors of the study. View this study on oce.ovid.com →