Chromium is an essential trace mineral recognized in clinical nutrition for its critical role in carbohydrate and lipid metabolism within the human physiological system. Specifically, the trivalent form, Chromium(III), is considered biologically active, functioning as a cofactor that potentiates the action of insulin. Adequate chromium status is vital for maintaining glucose homeostasis and supporting healthy cellular energy utilization, particularly in individuals with insulin resistance or pre-diabetes.
Origin
The element Chromium was discovered in the late 18th century, but its biological significance was not established until the mid-20th century with the discovery of the “Glucose Tolerance Factor” (GTF), a complex now understood to involve chromium. Its role in human health gained attention through studies exploring nutritional deficiencies and their link to impaired glucose tolerance, cementing its place as a micro-nutrient of endocrine relevance.
Mechanism
The primary mechanism of action for chromium involves its interaction with the insulin signaling cascade, where it is thought to facilitate the binding of insulin to its receptor on target cells. It is hypothesized to form a complex, possibly GTF, that increases the number or activity of insulin receptors, enhancing the intracellular signaling necessary for glucose uptake. This potentiation of insulin sensitivity helps transport glucose from the bloodstream into cells for energy production, thereby regulating circulating blood sugar levels.
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