The 6 Best Fiber Supplements for Women, According to Experts
Here's how to choose the best one for your G.I. symptoms.
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Fibermaxxing might be having a moment, but women don’t need to push their fiber intake to the extreme—they simply need enough. Women should aim for at least 25 grams of fiber per day, yet the average American gets only about 15 grams.
As a dietitian, I can confidently say that getting enough fiber is one of the simplest ways to support your health. Fiber keeps bowel movements regular, supports healthy blood sugar and cholesterol levels, and helps you stay full between meals. You don’t have to overhaul your diet, either—even adding a few extra grams each day can help close the gap.
Best Fiber Supplements for Women
- Best Overall: NOW Psyllium Husk Powder
- Best Fiber Blend: Momentous Fiber+
- Best Prebiotic Fiber: Thorne FiberMend
- Best Budget Fiber Supplement: Nutricost Psyllium Husk Powder
- Best-Tasting Fiber Supplement: 1st Phorm Multi-Fiber
I always encourage getting fiber from foods like fruits, vegetables, legumes, and whole grains first, since they provide much more than fiber alone—they’re also packed with vitamins, minerals, antioxidants, and other beneficial plant compounds. But getting enough of them every day isn’t always realistic. That's where the best fiber supplements can help. They don’t replace fiber-rich foods—they simply make it easier to get enough fiber on the days your diet falls short.
How We Selected
I’m a registered dietitian with over a decade of experience in nutrition writing and supplement evaluation. For this guide, I partnered with the Women’s Health team to review fiber supplements from trusted brands, focusing on the factors that matter most for women’s health.
Rather than choosing products based on fiber content alone, I prioritized evidence-backed ingredients—especially psyllium, which has some of the strongest research for digestive, heart, and metabolic health. I also considered fiber blends, capsules, flavored powders, and different serving sizes to meet a range of preferences and health goals.
Best Deal
NOW Psyllium Husk Powder
NOW Psyllium Husk Powder
Pros
- Provides 7 grams of soluble fiber per serving
- Single-ingredient formula without fillers or sweeteners
- Excellent value for the amount of fiber you get
Cons
- Thickens quickly after mixing
The only ingredient is psyllium husk, one of the most well-studied sources of soluble fiber for supporting digestive, heart, and metabolic health. It also delivers an impressive 7 grams of fiber per serving, making it one of the best values on this list.
You don’t have to use a full serving every time—you can easily adjust the amount to fit your needs. I also add it to oatmeal, yogurt, smoothies, or chia pudding instead of drinking it on its own.
Just keep in mind that psyllium thickens quickly once it’s mixed, so it’s best enjoyed right away.
Read More: Best High-Fiber Foods
| Fiber Type(s) | Psyllium |
| Fiber per Serving | 7g |
| Dose | 1 Tbsp |
| Cost per Serving | $0.30 |
Momentous Fiber+
Momentous Fiber+
Pros
- Provides soluble, prebiotic, and insoluble fibers
- Available in unflavored and cinnamon varieties
- Travel packs available for on-the-go convenience
Cons
- More expensive than single-fiber supplements
This formula provides 6 grams of fiber from three sources: soluble fiber from psyllium husk, prebiotic fiber from resistant potato starch, and insoluble fiber from rice bran hull.
Psyllium provides well-studied soluble fiber, while resistant potato starch acts as a prebiotic to nourish beneficial gut bacteria. Rice bran hull rounds out the blend by adding insoluble fiber to help promote regular bowel movements.
It’s available in both unflavored and cinnamon varieties, as well as convenient travel packs for days you're away from home—when getting enough fiber can be extra challenging.
Read More: Best Supplements for Women
| Fiber Type(s) | Psyllium, resistant potato starch, rice bran hull |
| Fiber per Serving | 6g |
| Dose | 2 scoops |
| Cost per Serving | $1.33 |
Thorne FiberMend
Thorne FiberMend
Pros
- Provides 7 grams of prebiotic fiber per serving
- Contains partially hydrolyzed guar gum (PHGG), a well-studied prebiotic fiber
- Mixes easily with minimal thickening
Cons
- Pricier than many other fiber supplements
- Available only in an unflavored option
This prebiotic fiber blend provides 7 grams of fiber per serving, primarily from partially hydrolyzed guar gum (PHGG), a well-studied soluble fiber known for its prebiotic effects.
Studies suggest PHGG helps nourish beneficial gut bacteria and supports regular bowel movements. Unlike psyllium, which forms a gel when mixed with liquid, it dissolves with little change in texture.
The formula also includes smaller amounts of arabinogalactan, pectin, and rice bran, which add a variety of prebiotics and soluble fibers to the blend, potentially supporting the gut in different ways.
| Fiber Type(s) | Partially hydrolyzed guar gum, arabinogalactan, pectin, rice bran |
| Fiber per Serving | 7g |
| Dose | 1 scoop |
| Cost per Serving | $1.50 |
Nutricost Psyllium Husk Powder
Nutricost Psyllium Husk Powder
Pros
- Exceptional value for the price
- Easy to customize your fiber intake
- One container will likely last for months
Cons
- May require multiple scoops to reach your fiber goal
- No flavored options
At about $27 for 680 servings, you’ll get far more servings per container than with many other fiber supplements—even if you use multiple scoops at a time.
Because each scoop provides 1 gram of fiber, you don’t have to commit to a large serving right away. That’s especially helpful if you're new to fiber supplements or only need a little extra fiber to fill the gaps in your diet.
| Fiber Type(s) | Psyllium |
| Fiber per Serving | 1g |
| Dose | ¼ tsp |
| Cost per Serving | $0.04 |
1st Phorm Multi-Fiber
1st Phorm Multi-Fiber
Pros
- Available in several flavored options
- Provides 9 grams of fiber per serving
- Offers a blend of soluble and prebiotic fibers
Cons
- Contains stevia and monk fruit, which may not appeal to everyone
- Pricier than some single-fiber powders
- Higher fiber content may cause gas or bloating if introduced too quickly
Available in chocolate, mango pineapple, and mixed berry, this multi-fiber supplement makes adding fiber to water, smoothies, or your morning protein shake a little more enjoyable. There’s also an unflavored option if you’d rather add it to recipes without changing the taste.
Each scoop provides a generous 9 grams of fiber from three sources. Psyllium provides soluble fiber, while soluble corn fiber and inulin have prebiotic effects that help nourish beneficial gut bacteria.
If you’re new to fiber supplements, start with a partial serving. At 9 grams of fiber per scoop, this is one you’ll want to ease into.
| Fiber Type(s) | Psyllium, soluble corn fiber, inulin |
| Fiber per Serving | 9g |
| Dose | 1 scoop |
| Cost per Serving | $1.03 |
Metamucil Psyllium Fiber Capsules
Metamucil Psyllium Fiber Capsules
Pros
- Convenient, mess-free alternative to fiber powders
- Provides a well-studied source of soluble fiber
- Easy to adjust your dose by taking fewer or more capsules as needed
Cons
- Requires five capsules for a full serving
- Not suitable for vegans (contains gelatin)
- More expensive per gram of fiber than most powders
If you’ve tried psyllium powder but couldn't get past the texture—or simply prefer the convenience of capsules—this is a practical alternative.
Each five-capsule serving provides 2 grams of soluble fiber from psyllium—no mixing required. While five capsules may sound like a lot, you can start with fewer and gradually increase the amount based on your needs.
The capsules are more expensive per gram of fiber than most powdered options, but if they’re easier for you to take consistently—whether at home, at work, or while traveling—that added convenience may be well worth it.
| Fiber Type(s) | Psyllium |
| Fiber per Serving | 2g |
| Dose | 5 capsules |
| Cost per Serving | $0.60 |
What to Consider
Fiber Type
This is the first thing I look at because it tells me what a fiber supplement is actually designed to do. Rather than asking, “What’s the best fiber supplement?” ask, “What do I want this supplement to help with?”
In general, here’s what each type of fiber does best:
- Soluble fiber: Helps support regular bowel movements and healthy cholesterol and blood sugar levels.
- Insoluble fiber: Adds bulk to stool and helps waste pass through your digestive tract more quickly.
- Prebiotic fibers: Feed the beneficial bacteria in your gut, helping support a healthy gut microbiome and overall digestive health.
Some fiber supplements contain just one type of fiber, while others combine several. A blend may be worth considering if you have multiple goals, such as supporting regular bowel movements while also nourishing beneficial gut bacteria. It can also provide a mix of fiber types, similar to what you’d get from eating a variety of fiber-rich foods.
Fiber per Serving
Fiber supplements can provide anywhere from about 1 gram to more than 9 grams of fiber per serving.
If you’re only trying to fill a small gap in your diet, you may not need a full serving. If you’re increasing your fiber intake, start with a smaller amount and gradually work your way up to help minimize gas and bloating.
Cost per Serving
A lower price tag doesn’t always mean you’re getting the better deal. I like to compare the cost per gram of fiber rather than the cost per serving, since serving sizes vary so much.
For example, a product with a 1-gram serving may seem inexpensive, but you could end up spending more to get the same amount of fiber as you would from a larger serving from another brand.
Type
Choose a type that naturally fits into your routine—and the one you’ll take. If you already make smoothies, stir yogurt into breakfast, or eat oatmeal, a powder is easy to work into foods you already enjoy. If you’re often on the go or don't want another drink to remember, capsules may be a better fit—just keep in mind you’ll usually need several capsules to provide the same amount of fiber as one scoop of powder.
Gummies are another option, but many contain very little fiber and include ingredients like sugar or sugar alcohols.
*Korin Miller and Ashley Martens provided additional reporting
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