1) In women with the APOE ε4 allele, higher plant-sourced nitrate intake (median intake 121 mg/day) was associated with a slower rate of cerebral aβ deposition [β: 4.47 versus 8.99/18 months] and right hippocampal atrophy [-0.01 versus -0.03 mm3/18 months, p < 0.01].2) Moderate intake showed protective associations in men carriers and in both men and women noncarriers of APOE ε4. The gene discussed is APOE; the disease is hippocampal atrophy.