Additionally, vitamin C inhibits matrix metalloproteinase‐9 (MMP‐9) activity to maintain blood–brain barrier integrity (Zhou et al. 2021; Ning et al. 2024; Kim et al. 2022) and reduces pro‐inflammatory cytokine IL‐6 levels, alleviating neuroinflammation associated with gestational hypertension (Biswas et al. 2024; Bhol et al. 2024). This evidence concerns the gene MMP9 and preeclampsia.