What exactly is a vegetable?
I may have missed it, but Oyebode et al. do not seem to say exactly what they mean by a vegetable or what the exact question was. This is important, because they do refer to a UK Department of Health website, which states that potatoes, yams, plantain, and casava should not be included the 5-a-day count, but sweetcorn should. I thought that sweetcorn was a grain and so would not count it as a vegetable, though I may be wrong, but if asked how many portions of vegetables I ate yesterday would definitely have included potatoes, a staple food in the UK, if I had eaten them. I think that the authors should clarify this.
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