International guidelines

United Kingdom

Published by:National Health Service England

Last published:2022

Published by:UK Food Standards Agency

Last published:2021

Published by:Public Health England

Last published:2018

North America

Published by:Centers for Disease Control and Prevention

Last published:2018

Published by:US Food and Drug Administration

Last published:2013 (reaffirmed 2021)

Rest of the world

Published by:The North Atlantic Treaty Organization (NATO)

Last published:2014

Published by:World Health Organization

Last published:2008

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