Chromium is a mineral our bodies use in small amounts for normal body functions, such as digesting food.   It is known to enhance the action of insulin.   Chromium is found in meat, whole-grain products, some fruits, vegetables & spices.  

Several studies have now demonstrated that chromium supplements enhance the metabolic action of insulin and lower some of the risk factors for cardiovascular disease, particularly in overweight individuals.  Chromium picolinate, specifically has been shown to reduce insulin resistance and help reduce the risk of cardiovascular disease & type 2 diabetes.  Supplements containing 200 to 1000 mcg chromium picolinate a day have been found to improve blood glucose control.  

In another study published in May 2015, they found that a caffeine-based CBA/Chromium III formulation curbs the adverse effect of high-fat diet on body weight and insulin action in mice.  Data suggests that this formulation could serve as a promising alimentary supplement to facilitate weight control in humans.  

Caution needs to be taken into account, as some other evidence suggests there are no adverse affects to taking Chromium.   The jury is still out, as various other studies show no effect of Chromium with people who are NOT diabetic or insulin resistant. 

As always, check with your health professional before taking supplements.  

http://www.ncbi.nlm.nih.gov/pubmed/15208835

http://www.ncbi.nlm.nih.gov/pubmed/18388893

https://ods.od.nih.gov/factsheets/Chromium-HealthProfessional/