An A-‘peel’-ing Part Of Fruit
Journal Of Agricultural And Food Chemistry

When you eat citrus fruit, don’t throw away the peel—it could be the best part. Several studies show that the peel may have hidden health benefits—a class of compounds, polymethoxylated flavones (PMFs) that could help lower your cholesterol—as much as some cholesterol-lowering medications, but without the side effects.

U.S. and Canadian researchers found that a diet that includes just one percent of these PMFs helped lower total cholesterol by nearly 30 percent and lowered LDL (bad) cholesterol by nearly 40 percent. The PMFs did not appear to affect HDL (good) cholesterol levels.

It’s not clear yet how these PMFs lower cholesterol; researchers speculate they may work like statin drugs, which inhibit the breakdown of cholesterol and triglycerides in the liver.

PMFs are found in a variety of citrus fruits, but the most common kinds, tangeretin and nobiletin, are found in the peels of tangerines and oranges. (Citrus juice also contains PMFs, but in much smaller amounts—in fact, you’d have to drink about 20 glasses of juice a day to get the amount of PMFs comparable to those used in the study.)

So how do you get some citrus skin into your diet? Use a tablespoon of grated, well-scrubbed orange or tangerine skin (zest) in baking, in tea, on salads, in salad dressing, mixed into yogurt, in soup, or even sprinkled on oatmeal or other hot cereal.