There are a few causes of dementia, but one of the primary factors is the homocysteine levels in the body. There has been a direct link established between heightened homocysteine levels and dementia, but consuming folate and carotenoids – a specific type of antioxidant – can lower those levels. Folate and carotenoids are also found in significant concentrations in kale, a newly popular cruciferous vegetable. If you switch from other green vegetables to kale, you have a much better chance of delaying the onset of dementia and other cognitive issues.