Williams, K., and H. Patel. “Dietary Amino Acid Deficiency With a Restrictive Raw Vegan Diet: A Case of Orthorexia Nervosa: Lacking Lysine/Methionine Madness”. International Journal of Disease Reversal and Prevention, vol. 2, no. 1, Feb. 2020, p. 6, doi:10.22230/ijdrp.2020v2n1a107.