USA Dietary Guidelines 2015

Did you know that, until the final quarter of the twentieth century, public health dietary advice in the US and the UK focused on minimum intakes, to ensure that populations consumed adequate nutrients? The US 1950s-1970s “Basic Four Foundation Diet” recommended four or more bread and cereal portions daily, two cups or more of milk and two or more servings of meat . The UK favoured micro nutrient recommendations; until the first macro nutrient guideline was introduced in 1950 with British Medical Association advice that dietary fat intake should provide a minimum of 25% of daily calories.
Zoe chats with Pippa Jones

Full analysis behind this discussion can be read here.