Pea fiber is a dietary fiber derived from the outer seed coat of peas, and it is increasingly included in functional foods due to its high fiber content. The potential benefit of pea fiber for fat metabolism is primarily supported by its well-established physiological effects as a source of insoluble and soluble fiber. Scientific studies have shown that dietary fiber can influence lipid metabolism by interfering with the absorption of dietary fat and cholesterol in the intestine, potentially lowering blood lipid levels and improving aspects of fat metabolism. Specifically, some animal and human studies suggest that pea fiber may reduce total cholesterol and LDL cholesterol, which are markers of improved fat metabolism. However, the evidence for pea fiber’s direct effect on “poor fat metabolism” (an imprecise term) is not robust or highly specific; most studies focus on cholesterol or satiety, not on correcting a metabolic disorder per se. No traditional or historical use specifically links pea fiber to fat metabolism, as its use is modern and based on nutritional science. In summary, there is moderate scientific evidence that pea fiber can modestly benefit fat metabolism via its effects on lipid absorption and cholesterol, but the evidence is not strong or highly specific to treating poor fat metabolism as a clinical condition.