I just saw something on the news about recommendations to add folic acid to flour. Said that thousands of birth defects would have been prevented. There's been a recommendation to do this for years but the government is stillness "considering" it.
In America, flour is fortified with folic acid and other vitamins. In fact, white bread is more "nutritious" than whole grain. There's also vitamin D added to milk. The UK has a genuine problem with vitamin D deficiency, so I'd think that this would make sense.
Apparently, the US government brought these measures in after the first world war, when recruiters were dismayed by the fitness of potential troops. According to what I have read, the practice can be linked to an increase in size and life expectancy of the American population. Obviously, Americans have their own health issues, but I don't understand why something so simple and effective wouldn't be employed here.
It's very likely I'm missing some facts about it and there are good reasons to not want to follow the American's on this.