[keithpeter]

I can't find any solid references, but there was an improvement in health, but part of the reason could be that people who would previously have had a poor diet were 'rationed up' to a balanced and healthy one: everyone got protein and fresh veg.

http://www.medicalnewstoday.com/releases/9728.php

PS: My Mum can still remember the first banana she saw, and getting fresh oranges (overseas sourced foods basically disappeared for 8 years)