In contrast, NOS1 (rs545654) (CT or TT) and NOS1 (rs12424669) (CT or TT) variants exhibited a 60% reduced risk of DLBCL in the group that consumed the fewest red vegetables and a 1.7–2.4-fold increased risk in the group that consumed the most. Here, NOS1 is linked to diffuse large B-cell lymphoma.