Chromium(III) picolinate (CrPic3)

Chromium(III) picolinate is a nutritional supplement composed of a coordination complex of trivalent chromium and picolinic acid[1][3]. It is marketed for metabolic regulation, particularly for promoting optimal insulin function and glucose utilization in patients with Type 2 diabetes and for weight loss promotion[3][5]. The compound has a distinctive reddish-pink crystalline appearance and exhibits superior bioavailability (2%-5% absorption) compared to conventional chromium formulations due to its GTF-like structure, which facilitates trans-membrane absorption[1]. However, despite its therapeutic applications, chromium picolinate has been associated with significant safety concerns, including enhanced oxidative stress, DNA damage, mutagenesis, and potential carcinogenic effects in animal studies, primarily through its ability to form complexes with cellular DNA and proteins[1][3]. The metabolism of chromium picolinate involves dissociation at the intestinal wall, with absorbed picolinic acid excreted primarily as N-picolylglycine, though some metabolites remain unidentified[1].

Other names

Chromium picolinateChromium(III) trispicolinatetris(picolinato)chromiumchromium tris-picolinateChromium GTF[3]

As a supplement rather than a drug target, chromium picolinate functions through: regulating insulin by promoting glucose utilization[3][5]; increasing sensitivity of the insulin receptor[3][5]; and having an excellent absorption rate (2%-5%) compared to ordinary chromium formulations (approximately 0.5%), attributed to its GTF-like structure similar to the biologically active form of chromium[1].