A similar experiment was performed using further homeopathic preparations sourced from kojic acid (KA), hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>; HP), 6-biopterin (BP), and [Nle<sup>4</sup>, D-Phe<sup>7</sup>]-α-melanocyte-stimulating hormone (NLE), some of which are known to induce vitiligo or melano-destruction at physiological dose.