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We searched for new studies on chromium, analyzed them, and added their information to our FAQs and database.
Chromium is a mineral that occurs naturally in the earth’s crust and is found in small amounts in a variety of foods. Chromium supplementation seems to enhance the effects of insulin in the body, leading to improvements in insulin sensitivity and blood sugar regulation in people with insulin resistance. Although chromium has historically been considered an essential nutrient for the human body, current evidence challenges this notion.
Chromium is most often used for
Last Updated:September 10, 2023
Chromium is an element commonly found in the earth's crust, primarily in trivalent (Cr(III)) and hexavalent (Cr(VI)) forms, and trivalent chromium is generally safe and present in various foods and supplements. Although it has been suggested that chromium may be essential for insulin function and metabolism, there is no global consensus on its necessity for the human body.
Chromium is primarily recognized for its role in blood sugar regulation, particularly in type 2 diabetes, where it may modestly lower hemoglobin A1c and improve insulin sensitivity. Additionally, it may offer mild antioxidant and anti-inflammatory effects, as well as slight weight loss benefits, though these effects are generally small and not consistently observed.
Chromium is generally well tolerated, and few side effects have been reported compared to placebo, but thorough safety analyses are lacking. Isolated case reports have noted issues such as anemia and liver dysfunction, sometimes at daily doses exceeding 1,000 µg, though these side effects have not been observed in clinical trials.
Chromium enhances insulin's effects and promotes glucose transport into insulin-sensitive tissues, likely through its binding to a biological complex called chromodulin, which amplifies insulin signaling. Additionally, chromium may reduce appetite and food cravings, potentially by affecting neurotransmission in the brain, though further research is needed to confirm this.
In research, chromium is generally supplemented at dosages ranging from 200–1000 µg daily. However, consistent dose-dependent responses haven’t been observed, and it’s unclear what an optimal dose of chromium might be.[1]
Supplemental chromium is available in a variety of forms, with chromium picolinate, chromium nicotinate, chromium chloride, and chromium-enriched yeast being the most commonly studied forms. There isn’t clear evidence suggesting one form is the best. When taken orally, chromium in both food and supplements is poorly absorbed by the body, with absorption rates ranging from just 0.4% to 2.5%.[2] While it has been circulated in the literature that chromium picolinate has superior absorption, the study this is based on used unreliable methods to measure chromium levels and was funded by a manufacturer of chromium picolinate.[3] Other research suggests that chromium picolinate does not have superior bioavailability compared to other forms of supplemental chromium.[4][5][1]
In terms of dietary requirements, in 2001 the Institute of Medicine proposed an adequate intake of chromium to be 30–35 and 20–25 µg daily for men and women, respectively. However, due to a lack of clinical research, this was based on estimated average intakes in the United States.[6] In 2014, the European Food Safety Authority claimed that it was inappropriate to suggest an adequate intake level of chromium due to a lack of evidence for the beneficial role of chromium on human health.[7]
Standard FAQ and database update
We searched for new studies on chromium, analyzed them, and added their information to our FAQs and database.
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