Why they're good for you: Some American research has indicated that eating 3oz (85g) of walnuts daily in place of other fat sources lowered blood cholesterol levels - although that would be a large amount of calories as a snack. They're also one of the few good plant sources of the omega 3 fats - good news for veggies or those that don't like oily fish!
Calories: 185 (28g)
Portion size: 28g is a good portion size to go for when snacking on walnuts (roughly 14 halves)
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