Cashews can be part of a brain-friendly diet when eaten raw or dry roasted. They contain healthy fats and important minerals that support overall cellular function.
However, fried snack mixes are less beneficial.
Repeatedly heated frying oils can produce oxidized compounds associated with inflammation and oxidative stress — two factors strongly linked to cognitive decline and neurodegenerative disease.
Many processed nut mixes also contain:
- Excess sugar
- Refined starches
- Artificial flavourings
- High sodium levels
Plain or dry-roasted cashews are generally the better choice.
Brazil Nuts: Powerful but Easy to Overeat
Brazil nuts are exceptionally high in selenium, a mineral that helps protect cells from oxidative damage and supports brain function.
However, too much selenium can become harmful surprisingly quickly.
Just one Brazil nut may provide a very large percentage of the recommended daily intake. Eating too many regularly may contribute to selenium toxicity, which has been linked to:
- Hair loss
- Brittle nails
- Nerve problems
- Mood changes
- Digestive issues
For most people, one or two Brazil nuts occasionally is more than enough.
