You Might Be Eating WAY Too Much Fibre — Without Realising It
By Jill Waldbieser; Photography by
Here’s what you need to know.
Fibre’s ability to lower cholesterol, keep you regular in the bathroom, and aid weight loss has been well-researched. However, like all good things, it’s possible to get TOO much of it. And now that it’s being added to foods where you wouldn’t normally find it—like yogurt and diet sodas—under un-recognisable names like polydextrose and inulin, you may not be aware of how high your daily tally actually is.
“When you have too much fibre, it can work against you,” says registered dietician, Keri Glassman. Overdosing on this indigestible plant material can actually strip your body of other essential nutrients as food gets pushed through your system too quickly for your body to absorb vitamins and minerals, and, ironically enough, even constipate you. The latter effect is the result of fibre soaking up water and slowing digestion to the point that it causes what Glassman calls a “traffic jam of waste” in your small intestine. Other side effects of too much indigestible plant material at once include bloating and diarrhoea. Fun!
If you want to avoid that fate, aim for between 21 and 25 grams of the stuff per day, and try to get it mostly from whole foods. It can be tough—for instance, it’d take 80 baby carrots, or five and a half oranges, or two cups of peanuts to meet that quota—but most whole foods contain a natural mix of soluble and insoluble fibre, and your body needs both. (Soluble fibre soaks up water, slows digestion, and helps manage blood sugar, while insoluble fibre acts like a broom that sweeps through your digestive system.) Beans, legumes, and whole grains like oatmeal are all great sources of both kinds.
Functional fibres added to foods may have similar effects, but the jury’s still out. They resist digestion like fibre but don’t have the other nutrients you find in fibre-rich foods, says Glassman. And often, the products they’re being added to aren’t all that healthy to begin with. To make sure you’re not inadvertently gumming up your GI tracts with extra indigestible stuff, read labels (here’s a guide from the of common culprits), especially when a product makes “added fibre” claims.
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