There appears to have been a recent reluctance from dieticians to use the term because of its manipulation by food marketeers, with the EU banning its use unless it can be proven.
However this page from Kraft Foods flags their top ten (none of which, I think, they make or sell):
- Oats — I regularly have oats in my breakfast
- Yoghurt — not regularly. I used to, but kind of went off it when I reduced my dairy intake last year. (Update: though come to think of it, we often have frozen yoghurt)
- Blueberries — not regularly
- Spinach — yep, it’s a green that the kids don’t mind eating, so it’s a staple in our house
- Nuts — yep, I’ve been trying to snack on these a bit more recently
- Soy beans — not really, though I have switched to soy milk on my breakfast cereal; does that count?
- Tomato — certainly cooked into pasta sauces. Sometimes on sandwiches
- Citrus fruits — not as often as I should
- Sardines and oily fish — ditto
- Rosemary and other herbs — not particularly often
What others are worth the bother?