KIWI, PRUNES OR PSYLLIUM: WHICH IS BEST FOR CONSTIPATION?

By Lora Jody, RDN,LD

Kiwi, prunes and psyllium are three evidence-based options that may help improve constipation. Each works a little differently and research has actually compared them head-to-head. Understanding their effects on stool frequency, consistency, bloating and tolerability can help you decide which approach may be worth trying. 

Kiwifruit

Kiwi provides fiber along with water and naturally occurring plant compounds.

One practical advantage is that kiwi can be incorporated into the diet as an ordinary whole food—added to breakfast, eaten as a snack or included in a smoothie.

In a clinical trial involving adults with chronic constipation, participants consuming two green kiwifruit per day experienced improvement in bowel movements.

Kiwi also performed particularly well from a tolerability standpoint.

Prunes

There's a reason prunes have been associated with bowel regularity for generations.

Prunes provide dietary fiber as well as sorbitol, a naturally occurring sugar alcohol that can draw water into the intestinal tract.

They can be effective, although some individuals experience gas or bloating.

Psyllium

Psyllium is a soluble, gel-forming fiber.

When combined with adequate fluid, it absorbs water and can improve stool consistency.

Unlike many supplements promoted for digestive health, psyllium has substantial evidence supporting its use for constipation.

However, increasing psyllium too quickly can cause bloating or gastrointestinal discomfort in some individuals.

What Happened When Researchers Compared Them?

A U.S. clinical trial compared two green kiwis per day, 100 grams of prunes per day and 12 grams of psyllium per day for four weeks in adults with chronic constipation.

All three interventions improved measures of constipation.

Kiwi was particularly interesting because participants experienced improvement with fewer adverse effects, and bloating scores also improved.

That doesn't mean kiwi will work best for everyone.

It does show something important:

Food can be a legitimate therapeutic nutrition tool.

Which Should You Try?

Your choice can depend on your symptoms and preferences.

If you want a whole-food approach that's easy to incorporate daily, kiwi is an excellent option to consider.

If you enjoy dried fruit and tolerate sorbitol well, prunes may work nicely.

If you need a consistent, measurable source of soluble fiber, psyllium can be very useful.

Whichever approach you choose, introduce changes gradually and pay attention to how your body responds.

Food First—Supplements When Appropriate

At Advanced Nutrition Therapy, my approach is not to replace food with supplements.

Instead, I look at how food, targeted supplementation and lifestyle strategies can work together to address the underlying factors contributing to symptoms.

Explore more evidence-based digestive health information in Nutrition Resources or visit Shop Nutrition for products I recommend.

Persistent constipation or a significant change in bowel habits should be discussed with a healthcare professional.

Nutrition Related Resources

Why Am I Constipated Even Though I Eat Plenty of Fiber?

Magnesium for Constipation: Which Type is Best?

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