Eating walnuts every day for six weeks doesn’t seem to boost your body’s overall antioxidant levels if you're a healthy older adult who already eats well.

Eating walnuts every day for six weeks doesn’t seem to boost your body’s overall antioxidant levels if you're a healthy older adult who already eats well.

Eating a small or medium handful of walnuts can quickly boost your body's natural antioxidants within an hour, at least in older adults who are otherwise healthy.

If you have metabolic syndrome and eat a healthy diet, adding a lot of walnuts or cashews every day for two months doesn’t seem to boost your body’s antioxidant levels any more than the healthy diet alone—even though nuts are packed with antioxidants.

If you're 50 or older and eat a small handful of raw walnuts every day for six weeks, it might help your body build up healthy fats in your blood cells — a sign that walnuts are getting into your cells and doing their job.

Eating a diet with lots of walnuts and cashews — making up 20% of your daily calories — may boost your body's antioxidant power more than a standard healthy diet if you have metabolic syndrome.