Sulforaphane for Brain Health

Research suggests that sulforaphane, a bioactive compound derived from cruciferous vegetables such as broccoli, may offer a range of neuroprotective effects relevant to brain health across the lifespan. Studies indicate that proposed mechanisms include activation of the Nrf2 antioxidant pathway, reduction of neuroinflammation, protection of the blood-brain barrier, and mitigation of hallmark Alzheimer's-related proteins such as amyloid-beta and hyperphosphorylated tau — findings supported by two 2025 reviews and a 2021 review, as well as a 2025 animal study examining vascular cognitive impairment. The available evidence is encouraging in its consistency, but it is important to note that the bulk of this research comes from preclinical sources, including cell studies, animal models, and narrative reviews, rather than from randomized controlled trials or large-scale human studies. As a result, while the mechanistic rationale is well-described in the literature, researchers themselves acknowledge that human clinical evidence remains limited and call for further studies before firm conclusions about efficacy in people can be drawn.