The study reported that zinc supplementation had a positive effect on ulcer size (length [−1.5 ± 0.7 vs. −0.9 ± 1.2 cm, p = 0.02] and width [−1.4 ± 0.8 vs. −0.8 ± 1.0 cm, p = 0.02]), serum insulin concentration (−8.0 ± 15.4 vs. +1.1 ± 10.3 μIU/mL, p = 0.009) and other similar metabolic variables in the group receiving zinc supplements.7 The gene discussed is INS; the disease is ulcer disease.