TTR and systemic sclerosis: As seen in Table 3, regarding biochemical tests, SSc patients with and without fructose malabsorption did not exhibit different median levels of ESR (P = 0.579), C-reactive protein (P = 0.827), albumin (P = 0.276), prealbumin (P = 0.455), ferritin (P = 0.941), plasma folic acid (P = 0.444), vitamin B12 (P = 0.115), magnesium (P = 0.835), zinc (P = 0.677), selenium (P = 0.077), and 25 (OH) vitamin D (P = 0.155).