Item	Authors’ judgement	Support for judgement
Adequate sequence generation?	Yes	The authors were interviewed by phone and advised that randomisation by a random table.
Allocation concealment?	Yes	Allocation unknown to groups and intervention provider until after allocation.
Blinding?	No	No placebo so not blinded.
Incomplete outcome data addressed?	No	HbA1c was nominated as a collected outcome but not reported. No withdrawals.
Free of selective reporting?	Unclear	A study protocol is not available but the published data includes all nominated and expected outcomes.
Free of other bias?	Yes	None identified.