Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Grapefruit fiber, primarily derived from the fruit's pulp and peel, is a source of soluble dietary fiber. There is some scientific evidence suggesting that dietary fibers, including those from grapefruit, may help reduce triglyceride levels. Soluble fibers can bind to bile acids and dietary fats in the gut, leading to decreased absorption of fat and cholesterol, which in turn can modestly improve lipid profiles. Several clinical studies on soluble fibers (such as pectin, which is abundant in grapefruit) have shown modest reductions in triglycerides and other blood lipids. For example, a few small studies have indicated that citrus pectin supplementation can lead to slight decreases in serum triglyceride levels in humans. However, these effects are generally modest and more pronounced for lowering cholesterol rather than triglycerides specifically.

Grapefruit itself has additional compounds (like naringin) that may influence lipid metabolism, but the evidence for its specific effect on high triglycerides is limited and not robust. Most major health guidelines recommend increasing overall dietary fiber intake as part of a strategy to improve lipid profiles, including triglycerides, but do not single out grapefruit fiber as uniquely beneficial. The evidence base is graded as weak to moderate (2 out of 5), largely because most studies use mixed sources of fiber or focus on cholesterol-lowering effects rather than triglyceride reduction specifically.

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