Study	Reason for exclusion
Albarracin 2008	Combination therapy of chromium picolinate and biotin versus placebo
Bunting 1994	Animal study
Diaz 2008	Combination therapy of chromium picolinate and conjugated linoleic acid in tonalin oil versus placebo and canola oil
Docherty 2005	Participants not obese or overweight
Earle 1989	Participants not obese or overweight
Geohas 2007	Combination therapy of chromium picolinate and biotin versus placebo
Hoeger 1998	Combination therapy of chromium picolinate, inulin, capsicum, L‐phenylalanine and other lipotropic nutrients versus placebo
Joyal 2004	Not a randomised trial
Pasman 1997	Not a randomised trial
Pittler 2004	Not a randomised trial
Rabinowitz 1983	Participants not obese or overweight
Stupar 1999	Not a randomised trial
Trent 1995	Participants not obese or overweight
Wang 2010	Not a randomised trial
Wilson 1995	Participants not obese or overweight
Zenk 2007	Combination therapy investigating 3‐acetyl‐7‐oxo‐dehydroepiandrosterone alone (7‐Keto) and in combination with calcium citrate, green tea extract, ascorbic acid, chromium nicotinate and cholecalciferol (HUM5007) versus placebo