Metamucil vs Olly vs Vitafusion fiber gummies: how the big brands compare

Walk down the fiber aisle and three names jump out. Metamucil, OLLY, and Vitafusion. The jars look alike. The gummies taste alike. So does it matter which one you grab?

A little. We pulled each label from the brand's site and from the NIH Dietary Supplement Label Database. We added Nature's Bounty and two store brands, since those sit on the same shelf. Then we checked what the research says about each fiber. Yes, we sell a fiber gummy too. It is in the table, with its price.

Metamucil vs OLLY vs Vitafusion: what is the difference?

The fiber grams are almost the same. The fiber type, sweetener, and gelatin are not.

Gummy	Serving	Fiber	Fiber type	Sugar and sweetener	Gelatin?	Price we saw
Metamucil Fiber Gummies	3 gummies	5 g	Inulin, Fibersol (soluble corn fiber)	2 g sugars, 0 g added; xylitol	No (pectin)	Not checked
OLLY Fiber Gummy Rings	2 gummies	5 g	FOS (fructooligosaccharides)	2 g added sugar	Yes	$19.99 for 25 servings, about 16¢ a gram
Vitafusion Fiber Well Sugar Free	2 or 3 gummies (see note)	2.5 g per gummy	Polydextrose	0 g sugar; sugar alcohol plus sucralose	Yes	$13.49 for 90 gummies, about 6¢ a gram
Nature's Bounty Fiber Gummies	3 gummies	5 g	Inulin from chicory root	2 g sugars, 0 g added	Yes	Not checked
Seya Full Fiber	3 gummies	about 6 g	Resistant tapioca fiber	3 g added sugar; no sugar alcohol	No (vegan)	$24.99 for 60 gummies, about 21¢ a gram

A note on Vitafusion. Its own page now says a 3-gummy serving gives 7.5 grams. The labels on file with the NIH say 2 gummies give 5 grams. Both work out to 2.5 grams per gummy. The two NIH entries also list different sugar alcohols, sorbitol on one and xylitol on the newer one. Check the jar you buy.

Prices are from each brand's own store on October 30, 2026. Retail prices move every week. To compare any jar, divide the price by the total grams of fiber in it.

How much fiber is in Metamucil fiber gummies?

Five grams per 3 gummies, from inulin and Fibersol. That is the orange gummy's label in the NIH database.

Here is the part most people miss. The gummy is not psyllium. Metamucil's powder is psyllium husk, and psyllium is the fiber with the most proof for regularity. The gummy uses a different recipe. Its label lets you take up to 3 servings a day, from age 12. It also says new users should start with 1 to 3 gummies and build up.

If you want the full Metamucil story, we compared it line by line in Seya vs Metamucil fiber gummies.

Are OLLY fiber gummies effective?

They deliver what the label says: 5 grams of FOS per 2 gummies. FOS is a prebiotic, which means it feeds gut bacteria. That is a real job. It is just not the same job as a bulking fiber like psyllium.

The dose sits right at a known line. In a 2010 trial of 26 healthy adults, up to 5 grams a day of oligofructose (another name for FOS) was well tolerated. At 10 grams, gut symptoms rose clearly. Gas came first, then bloating. So one OLLY serving is fine for most people. Doubling up is where trouble may start. OLLY's label says not to exceed 2 gummies a day anyway.

OLLY is also the only one of the big three with added sugar, at 2 grams per serving. That is small. It still counts if you track sugar.

What is in Vitafusion Fiber Well?

Polydextrose, a man-made fiber built from glucose. A 2016 review in Nutrients found it acts like other dietary fibers and shows prebiotic potential. It has about 1 calorie per gram.

Vitafusion is sugar free. The sweetness comes from a sugar alcohol plus sucralose. About 1 gram of sugar alcohol per 2 gummies is not much. But sugar alcohols can loosen stools in large amounts. The FDA makes foods that could add up to 50 grams of sorbitol a day carry the line "Excess consumption may have a laxative effect," under 21 CFR 184.1835. A gummy serving is far below that. If sugar-free candy bothers you, though, this is the label line to watch.

The Vitafusion label also says to cut back if minor gas or bloating occurs. That is good advice for any fiber.

Which fiber gummy is gentlest on bloating?

No trial has tested these brands head to head. What we do have is data on the fibers inside them.

• Inulin (Metamucil, Nature's Bounty): in a 2022 MRI trial in the journal Gut, inulin made the biggest rise in colon gas of the drinks tested. Those were 20 gram doses in 19 adults with IBS, about 4 times a gummy serving. In healthy adults, up to 10 grams a day of inulin was well tolerated in the 2010 trial.
• FOS (OLLY): well tolerated up to 5 grams a day in that same 2010 trial. One serving is exactly 5 grams.
• Polydextrose (Vitafusion, store brands): we found no gas trial at gummy doses. The Vitafusion and store-brand gummies also add a sugar alcohol.
• Resistant tapioca fiber (Seya): it ferments too. We found no head-to-head trial against inulin, so we will not claim it is gentler.

The safest plan works with any brand. Start with half a serving for a week. Drink water. Then build up.

Which store-brand fiber gummies are worth it?

If Vitafusion suits you, the store brands are near copies. Target's up&up Fiber Gummies list polydextrose, 5 grams per 2 gummies, gelatin, xylitol, and sucralose. Meijer Fiber Gummies list the same fiber and dose, with xylitol and gelatin. If one is cheaper per gram where you shop, it is a fair swap.

Nature's Bounty is the inulin pick. Its current label gives 5 grams of chicory root inulin per 3 gummies, with no added sugar and no sugar alcohol. Older jars were 2 gummies with vitamin D added, so read the jar on the shelf.

For cost per gram against powders, see are fiber gummies worth the money.

Do any big-brand fiber gummies have psyllium?

None of the ones we checked. That matters if regularity is your main goal. A 2022 review of 16 trials found psyllium worked best for chronic constipation, mostly at more than 10 grams a day for at least 4 weeks. A 5 gram gummy serving is about half that dose, and it is a different fiber.

So a gummy is a top-up, not a full dose. The Daily Value for fiber is 28 grams, set in 21 CFR 101.9. Food still does most of the work. If you want psyllium, our guide to what is better than Metamucil covers it.

How do you pick between them?

• You want the lowest price: Vitafusion or a store-brand copy, at about 6 cents a gram. Skip it if you avoid gelatin or sugar alcohols.
• You want no gelatin and no added sugar: Metamucil Fiber Gummies. It does use xylitol.
• You want a prebiotic and fewer gummies: OLLY, at 2 gummies a serving. It has 2 grams of added sugar and gelatin.
• You want inulin without a sugar alcohol: Nature's Bounty.
• You want vegan with no sugar alcohol: Seya, with the trade-offs below.

The best fiber gummies for women ranks these picks for women's needs.

Where does Seya fit, honestly?

Seya Full Fiber is a vegan gummy that supports regularity. Three gummies give about 6 grams of fiber, mostly resistant tapioca fiber. Each serving also has 100 mg of ginger root and 80 mg of magnesium citrate. It has 3 grams of added sugar, no gelatin, and no sugar alcohol. Read more about resistant tapioca starch.

Per gram, we cost the most in this table. Like the others, we are not psyllium. Our case is a vegan chew without sugar alcohols, for people who skip their fiber when it is a chore. A Seya creatine gummy is coming January 2027.

This is education, not medical advice. If you take daily medication, are pregnant, or have a gut condition, ask your clinician first.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Frequently asked questions

How much fiber is in Metamucil fiber gummies?

Five grams per 3-gummy serving, from inulin and Fibersol, a soluble corn fiber. The label allows up to 3 servings a day for ages 12 and up. The gummies do not contain psyllium, the fiber in Metamucil powder.

Are OLLY fiber gummies effective?

They give 5 grams of FOS, a prebiotic fiber, per 2 gummies. In a 2010 trial, up to 5 grams a day of FOS was well tolerated and 10 grams raised gas and bloating. They are not psyllium, so they have less proof for regularity.

Which store-brand fiber gummies are worth it?

Target up&up and Meijer fiber gummies use the same polydextrose fiber and 5 gram dose as Vitafusion Fiber Well, with xylitol and gelatin. If they cost less per gram where you shop, they are a fair swap.

Is Metamucil, OLLY, or Vitafusion best?

It depends on your trade-off. Vitafusion cost the least per gram in our check, about 6 cents. Metamucil has no gelatin and no added sugar. OLLY needs only 2 gummies but has 2 grams of added sugar. All give about 5 grams of fiber per serving.

Written and reviewed by the Seya Health Editorial Team. Every health claim on this page is sourced to primary research or a government source. Labels and prices were checked on October 30, 2026. This article is educational and not a substitute for medical advice.