Citrucel and Benefiber are both “gentle” fiber supplements, so they are easy to confuse. The Citrucel vs Benefiber comparison comes down to one difference: Citrucel’s fiber is not fermented (so it causes little gas), while Benefiber’s is fermented (so it feeds gut bacteria). Here is which to choose.
Quick answer
In Citrucel vs Benefiber, choose Citrucel (methylcellulose) for constipation with the least gas, since gut bacteria do not ferment it. Choose Benefiber (wheat dextrin) for a clear-mixing daily fiber with a prebiotic effect. Citrucel adds more bulk; Benefiber is easier to hide in drinks.
Medical note: This is general information, not medical advice. Take either with plenty of water and 2 hours apart from medicines.
Citrucel vs Benefiber at a Glance
| Citrucel | Benefiber | |
|---|---|---|
| Fiber | Methylcellulose | Wheat dextrin |
| Fermented (gas)? | No | Yes, moderately |
| Prebiotic? | No | Yes |
| Forms a gel? | Lightly | No |
| Forms | Powder, caplets (500 mg each) | Powder (3 g per 2 tsp) |
| Best for | Constipation, bloating-prone people | Easy daily top-up, gut bacteria |
Citrucel vs Benefiber for Constipation
Citrucel is the stronger option. Methylcellulose holds water and adds bulk to stool, and because it is not fermented, it is a good choice if other fibers cause gas. Benefiber helps mild constipation but adds less bulk. For stubborn constipation, psyllium is usually stronger than either. See best fiber supplement for constipation.
Citrucel vs Benefiber for Gas and Bloating
Citrucel wins. Non-fermentable fiber produces almost no gas. Benefiber can cause some gas, especially at higher doses or in people with IBS.
Citrucel vs Benefiber for Gut Health
Benefiber wins. Wheat dextrin feeds beneficial gut bacteria, which Citrucel does not. See best prebiotic fiber supplement.
Which Should You Choose?
- Citrucel: constipation, bloating, IBS-C, or if psyllium gave you gas.
- Benefiber: a no-fuss daily fiber, mixing into coffee or food, prebiotic support.
See also Metamucil vs Benefiber and best fiber supplement.
Frequently Asked Questions
Which is better, Citrucel or Benefiber?
Citrucel is better for constipation, especially if you get gas, because methylcellulose adds bulk without fermenting. Benefiber is better for an easy, invisible daily fiber top-up.
What is the difference between Citrucel and Benefiber?
Citrucel contains methylcellulose, a non-fermentable soluble fiber that forms a light gel. Benefiber contains wheat dextrin, a fermentable soluble fiber that dissolves clear.
Does Citrucel cause gas?
Very little, because gut bacteria do not ferment methylcellulose.
Does Benefiber cause gas?
It can, because wheat dextrin is fermented, though usually less than inulin.
How much fiber is in Citrucel caplets?
Each caplet contains 500 mg of methylcellulose; adults start with 2 caplets per dose.
How much fiber is in Benefiber?
3 g of fiber per 2 teaspoons for adults.
Is Citrucel a prebiotic?
No. Because it is not fermented, it does not feed gut bacteria. Benefiber’s wheat dextrin is prebiotic.
Which is better for IBS, Citrucel or Benefiber?
Citrucel is often better tolerated for IBS bloating. Sunfiber is another gentle option.
The Bottom Line
Citrucel vs Benefiber is gas vs gut bacteria. Citrucel relieves constipation with the least gas; Benefiber is the easiest daily fiber and feeds your microbiome. Both are gentle, safe options for most adults.
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