Characteristic	Intervention(s) [route, frequency, total dose/day]	Comparator(s) [route, frequency, total dose/day]
Kaats 1996	I1: chromium picolinate once a day, 200 μg/day	Placebo once a day
	I2: chromium picolinate once a day, 400 μg/day
Kaats 1998	Chromium picolinate once a day, 400 μg/day	Placebo once day
Joseph 1999	Chromium picolinate twice daily, 1000 μg/day + RT (twice weekly for 12 weeks)	Placebo + RT (twice weekly for 12 weeks)
Kleefstra 2006	I1: Chromium picolinate twice daily, 500 μg/day	Placebo capsule twice daily
	I2: Chromium picolinate twice daily, 1000 μg/day
Iqbal 2009	Chromium picolinate capsule twice daily, 500 μg/day	Placebo capsule twice daily
Volpe 2001	Chromium picolinate once a day, 400 μg/day + a supervised weight‐training and walking program (twice weekly for 12 weeks)	Placebo once a day + a supervised weight‐training and walking program (twice weekly for 12 weeks)
Anton 2008	Chromium picolinate 1000 μg/day	Placebo
Campbell 1999	Chromium picolinate twice daily, 924 μg/day + RT (twice weekly for 12 weeks)	Placebo twice daily + RT (twice weekly for 12 weeks)
Yazaki 2010	Chromium picolinate capsule twice daily, 500 μg	Placebo capsule twice daily, 815 mg
Footnotes I: intervention; RT: resistance training