A "healthy diet"is all very well, but you would need a mule to carry that amount of fresh food on even a week hike. Your "5 a day" weighs 400 g and would be rotten in a week(even here in the N.E.) a Daily Multiple USP weighs under 2 g and makes sure you get ALL of the required substances. The carbs can easily (and tastily) be carried as dehydrated pasta,rice or potato. A spoonfull of metamucyl (spelling?) in the morning oatmeal(or "breakfast essential") takes care of that - and don;t underestimate the importance of staynig regular. Boost protein content of meals by adding whey powder (or Soy equivalent) - fresh protein is really heavy and rots even quicker than the fruits. Oils and fats are best obtained from nuts, the least expensive and most convenient being peanut butter(OK, I know peanuts are not really nuts).

These are not dietary supplements, but essential parts of a balanced healthy diet in hiking circumstances.

And they are typically,light weight, the title of the thread is "lite food" after all.