Malaria patients with G6PD MahidolG487A mutation (n = 17) compared to wildtype patients without common Southeast Asian (SEA) mutations including the G6PD MahidolG487A (n = 215) exhibited a significant decrease in haemoglobin levels (11.16 ± 2.65 g/dl vs. 12.66 ± 1.92 g/dl; p = 0.041). Here, G6PD is linked to malaria.