How do they do it? It's not just the Princess of Wales, Beatrice is slim these days, as are other European royals, what's the secret? They all look very healthy, well proportionated for their shape with incredibly tiny waists.
It goes without saying they have access to good food/chefs etc but I doubt they are used 24/7 to meet every need (quite frankly, if I had access to such means I would be the size of a house!). They work, but not a routine 9-5 and they have young children whose lives they are very involved in.
Exercise certainly comes into it, but none look like this is done to excess.
Vegan? Gluten Free?
Looking for ideas more than debate!