See BBC News report and also Walesonline report. The Walesonline report tells us that Rhys Morgan, a 15 year old Cardiff schoolboy, has been campaigning on this matter since finding on the internet "that MMS is banned in Canada and that America’s Food and Drug Administration agency warns that when used as directed, MMS produces an “industrial bleach that can cause serious harm to health." - Well done, Rhys!
'Miracle Mineral Supplement' is 28% sodium chlorite. It clearly should not be ingested/swallowed.