The best fiber supplements for hemorrhoids

Fiber is the home treatment with the best evidence for hemorrhoid bleeding. In a 2006 meta-analysis of seven fiber trials, people who took fiber were about half as likely to keep bleeding as people who did not ¹. If you buy one product, buy a psyllium powder you will actually drink. For most adults that is sugar-free orange Metamucil.

Fiber softens the stool so you strain less. That is the job the NIDDK treatment page gives it, alongside fluids and shorter toilet sits ⁸. A large prolapsed hemorrhoid can still need more than a powder. The food version of the same idea is in our hemorrhoid diet guide. A supplement covers the gap when meals do not.

This page matches six well-reviewed supplements to that evidence: who each one suits, how much the trials used, how to take psyllium without choking on a gel, and what to do if a month of fiber does not change the bleeding.

Our picks compared

Psyllium powders sit at the top because that is the fiber the constipation trials support. The other three are here for people who will not drink psyllium.

Reviews of our picks

The short verdict under each pick is who it suits. The sections after that explain the dose, the timing, and the safety limits.

How we chose these fiber supplements

We started with fiber supplements that already had strong overall ratings from a large number of buyers, then read recent reviews for the same praises and the same complaints. Taste, texture, travel, and how many capsules a dose takes showed up again and again. Those patterns decided the awards. We did not use a single glowing review, and we did not let a brand pay for a slot.

The research decided the order. Psyllium has trial evidence for softer stools and, in the hemorrhoid review, for less bleeding ^1,2. Wheat dextrin and a small gummy dose do not have that same record, so they rank lower even when buyers like them. Konsyl has fewer reviews than the household names. We kept the sticks because recent buyers keep describing the same practical use: a set dose that survives a trip.

What the research says

The hemorrhoid evidence comes from one systematic review of seven trials. Alonso-Coello and colleagues pooled seven randomized trials with 378 patients ¹. Fiber lowered the risk of symptoms that failed to improve (relative risk 0.53, 95% confidence interval 0.38 to 0.73) and lowered the risk of bleeding by half (relative risk 0.50, 95% confidence interval 0.28 to 0.89). The bleeding result is real, and the confidence interval is wide, so the true effect could be smaller than half. Pain, itching, and prolapse leaned in fiber’s favor, but those intervals were wide enough that no effect is still possible. Studies that checked again, usually at six weeks and at three months, saw the same pattern. Mild side effects were a bit more common with fiber, and that difference was not statistically significant.

A later look at constipation, which is the problem fiber is trying to fix, is larger. A 2022 meta-analysis of 16 randomized trials included 1,251 adults ². About 66% of people on fiber improved, compared with 41% on the control treatment (relative risk 1.48). Psyllium and pectin were the fibers with a clear effect. The benefit showed up at doses above 10 grams a day. Stool frequency improved when people stayed on fiber for at least four weeks. Flatulence was higher in the fiber groups. The authors warned that the trials disagreed with each other a lot, so treat the average as a rough guide.

One head-to-head trial compared psyllium with the stool softener docusate sodium in 170 adults with chronic constipation ³. Psyllium was 5.1 grams twice a day. Docusate was 100 milligrams twice a day. After two weeks, psyllium increased stool water more than docusate, and bowel movements averaged 3.5 per week on psyllium versus 2.9 on docusate. That is the main reason our stool softener, fiber, or laxative comparison puts fiber first for hemorrhoids, with softeners as a short bridge. The stool softener roundup is there if a clinician wants a softener for a few days.

A smaller US trial gave adults with chronic constipation psyllium at 12 grams a day, prunes, or kiwifruit for four weeks ⁴. All three raised the number of complete bowel movements. Straining improved on psyllium too. Side effects were most common in the psyllium group. Kiwifruit caused the least upset, which matters if gas is why you quit fiber last time. Prunes and kiwifruit are food, and they belong in the hemorrhoid diet alongside a supplement.

Water is part of the dose. In a two-month trial, 117 adults ate about 25 grams of fiber a day ⁵. The group told to drink about 2 liters of mineral water had more bowel movements and used fewer laxatives than the group drinking about 1.1 liters. The NIDDK hemorrhoid diet page says liquids help the fiber in your diet work, and that you should ask a clinician how much to drink for your health and where you live ⁷.

Why the target is higher than a supplement serving

The Dietary Guidelines for Americans, cited on that NIDDK page, set fiber at 14 grams per 1,000 calories ⁷. On a 2,000-calorie day that is 28 grams. The American College of Obstetricians and Gynecologists tells women to aim for 25 grams a day and notes that many Americans get about 15 ⁹. A separate review of national surveys put the share of people who meet fiber recommendations at about 5% ¹⁰. A supplement of 5 to 12 grams closes part of that gap. Meals still have to carry most of the day’s fiber. Our fiber calculator adds up a normal day so you can see the hole before you pick a powder.

Constipation and hemorrhoids travel together more often than an old survey suggested. In a colonoscopy study of 2,813 adults, constipation was more common in people who had hemorrhoids (odds ratio 1.43), and a higher intake of grain fiber went with a lower risk (odds ratio 0.78) ⁶. That study enrolled people already coming in for screening, so it cannot tell you that a jar of powder prevents every flare.

Psyllium, wheat dextrin, and gummies

NIDDK names two supplement fibers for hemorrhoids: psyllium and methylcellulose ⁸. Our list stays with psyllium products plus two alternatives buyers actually finish. Benefiber is wheat dextrin. A 2016 review concluded that readily fermented soluble fibers such as wheat dextrin do not increase stool water or stool output, while gel-forming psyllium does ¹³. One author of that review works at the company that makes Metamucil, so read it with that in mind. Buyers of Benefiber still say it keeps them regular. We still rank psyllium first for bleeding, because that is the fiber the hemorrhoid trials were testing ¹.

The gummies are a blend, and the listing states 5 grams of fiber per serving. That is half of the 10-gram line from the constipation review ². People who get gas from them are describing a side effect the trials already measured. Use them if taste is the only way you will take fiber. Do not expect one small serving to match a psyllium powder.

How to choose

Match the product to what you will take on a boring Wednesday.

Skip a powder if swallowing is already hard. Psyllium swells when it meets liquid. MedlinePlus lists trouble swallowing among the effects that need a clinician ¹⁴. People who prefer no sweetener should skip the orange Metamucil and use Anthony’s or Konsyl. Severe outside pain is a cream problem, or a problem for a clinician. Our treatment overview lays out creams, office procedures, and surgery next to home care.

During pregnancy, fiber is a reasonable first step for constipation, which raises the chance of hemorrhoids. A Cochrane review found one small trial, 40 women, in which fiber supplementation added about 2.24 bowel movements per week compared with no fiber ¹¹. Stimulant laxatives helped constipation more than bulk-forming laxatives in another pregnancy trial, and they also caused more abdominal discomfort and diarrhea. ACOG describes bulk-forming laxatives as the ones thought to be safest ⁹. Run any new daily supplement past your obstetric provider. Our pregnancy hemorrhoid guide covers the rest of what is considered safe.

How to use them safely

MedlinePlus instructions for psyllium say to mix powder or granules with 8 ounces (240 milliliters) of liquid right before you drink it, and to drink at least 8 ounces of liquid with the dose ¹⁴. That includes capsules: the page says you need that liquid for psyllium to work and to limit side effects. Do not swallow dry powder. If the drink sits, psyllium turns thick. Buyers of the orange powder and of the Konsyl sticks both describe that. Stir and finish it.

Psyllium is usually taken one to three times a day. Follow the package. A practical start, lined up with the trial doses, looks like this:

1. Days 1 to 3: one small serving once a day, with 8 ounces of liquid, plus your usual drinks.
2. After that: move toward a daily total above 10 grams of psyllium if your stomach allows it. For Konsyl, that is more than one 5-gram stick. For a flavored powder, use the scoop on the label and add up the grams.
3. Keep going for four weeks before you judge it, unless bleeding, pain, or side effects tell you to stop sooner ^2,4.
4. Take other medicines at a different time. MedlinePlus says not to take digoxin, aspirin, or nitrofurantoin within 3 hours of psyllium, and to tell your pharmacist about the rest of your medicines because doses sometimes need a change ¹⁴.

Gas is the expected downside ². If you balloon, cut the dose in half for several days, then climb again. A hot drink or a short walk after a meal is fine. Do not “push through” severe cramps.

If four weeks of psyllium and water have not softened your stools, look at toilet habits next. Straining and long sits keep hemorrhoids angry even when the diet is decent. Our toilet habits guide covers a footstool, a time limit, and how to clean without scraping sore skin. Prevention after the flare settles is the same trio, written out in how to prevent hemorrhoids.

From the blogStool softener, fiber or laxative: which one for hemorrhoids?

Fiber, stool softeners, and laxatives for hemorrhoids: what the McRorie trial, fiber reviews, and the AGA/ACG constipation guideline found.

When to see a doctor instead

Bright red blood on the paper can be a hemorrhoid, and it can be something else. Fiber is a treatment for the first situation once a clinician is satisfied about the second. Read what bleeding from hemorrhoids looks like and when to see a doctor if you are unsure which camp you are in.

The USPSTF recommends colorectal cancer screening starting at age 45 for adults at average risk ¹². New rectal bleeding at that age, or older, needs a proper look even if you are sure it is a hemorrhoid. NIDDK says to get care right away for severe anal pain and rectal bleeding, especially with belly pain, diarrhea, or fever ⁸.