9 Best Fiber Powders for Weight Loss 2026

Silky, invisible integration—that’s where Benefiber shines. With wheat dextrin as its plant-based prebiotic core, this unflavored fiber powder dissolves completely in non-carbonated drinks and soft foods, leaving zero grit or aftertaste. It’s engineered for stealth: perfect for picky palates or anyone who hates the chalky mouthfeel of most supplements. By supporting GLP-1 pathways, it helps curb hunger naturally, bridging the all-too-common fiber gap without disrupting your daily routine.

In real-world use, it’s a digestive peacekeeper—gentle enough for daily use, even on sensitive stomachs. Each serving delivers 3 grams of soluble fiber, which may not top the charts, but stacks up when taken consistently. It performs best when mixed into morning oatmeal or a midday smoothie, though carbonated beverages can hinder full dissolution. While it won’t blast through constipation like bulk-forming psyllium, it excels at low-key maintenance, preventing irregularity before it starts.

Compared to psyllium-heavy options like Metamucil, Benefiber trades raw fiber power for effortless usability and discretion. It’s not the most aggressive gut mover, but for someone seeking a “set it and forget it” fiber habit—especially those avoiding texture or flavor interference—it’s unmatched. Ideal for office workers, parents, or anyone who values clean blending over clinical potency, it delivers steady support without drama. It offers less fiber per scoop than NOW Psyllium Husk, but wins on user comfort and consistency.

This isn’t just fiber—it’s a wellness trifecta. Belli Welli steps beyond basic digestion with organic acacia fiber, collagen, electrolytes, and probiotics packed into one watermelon-flavored scoop. The formula feels like a holistic upgrade, especially for women navigating hormonal shifts or post-workout recovery. No bloat, no gas, no gritty after-feel—just a light, refreshing mix that supports gut balance and skin resilience in one go.

Real-world testing shows it’s exceptionally easy on the stomach, even for those prone to fiber-induced discomfort. Acacia fiber is naturally low-FODMAP and ferments slowly, meaning fewer gas spikes compared to inulin or psyllium. Each serving delivers 6 grams of fiber and only 2g of sugar, making it suitable for low-sugar lifestyles. It blends instantly in water or smoothies and works well for midday slumps—especially when paired with hydration, thanks to its electrolyte boost.

Against Supergut or GOBIOTIX, Belli Welli stands out by layering beauty and performance. While others focus purely on gut signaling or ketosis support, this one nurtures from the inside out—ideal for multitaskers who want fiber to do more. It’s pricier per serving than basic powders, but the added nutrients justify the cost for those seeking comprehensive daily support. Compared to Flatter Me, it’s less aggressive on appetite suppression but far gentler and more rounded in benefits.

Meet the GLP-1 whisperer—Supergut is engineered for satiety science. At its core is resistant starch, a powerful prebiotic fiber proven to stimulate GLP-1 hormone activity, which helps regulate appetite and metabolic health. With 6 grams of fiber and only 17 calories per serving, this sugar-free powder is a metabolic ally for weight-conscious users looking to crush cravings without stimulants. It’s like a silent partner in portion control.

In practice, it shines when taken before meals—curbing hunger within 30 minutes and sustaining fullness for hours. The powder dissolves cleanly in water or tea, with a light, neutral taste that doesn’t dominate. Its low-FODMAP, keto-friendly profile makes it ideal for strict diets, and it plays well with intermittent fasting or low-carb regimens. It doesn’t bulk up stool like psyllium, so those needing strong laxative effects might find it underpowered.

Stacked against Flatter Me, Supergut is less about immediate bloat relief and more about long-term metabolic tuning. It’s the smarter pick for people focused on sustainable weight management rather than quick fixes. While it has fewer servings than bulk powders, its precision formulation targets modern health goals with surgical accuracy. It doesn’t match Micro Ingredients in volume, but wins on functional design and targeted gut-brain signaling.

This is fiber on fast-forward. Flatter Me packs a clinical-grade punch with 10 grams of fiber per serving and an 18-enzyme spectrum that starts working in as little as 30 minutes. Designed to double GLP-1 levels, it’s built for immediate appetite control and post-meal comfort—making it a go-to for holiday seasons or high-carb days. The science-backed formula turns digestion into a precision tool, not just a cleanup crew.

When tested before a heavy meal, it significantly reduced bloating and overeating urges. The 4-teaspoon dose mixes into 16 oz of water and delivers a noticeable fullness signal that lasts up to four hours. However, the larger scoop size and required water volume can feel cumbersome for daily long-term use. It’s best reserved for targeted situations—big dinners, travel, or cheat meals—rather than as a casual daily add-in.

Compared to Supergut, Flatter Me is more aggressive and situational, trading convenience for power. It’s not the easiest to carry or mix on the go, but for those needing real-time digestive armor, it’s unmatched. While GOBIOTIX offers smoother integration, Flatter Me wins when you need rapid debloating and appetite shutdown. It’s the tactical fiber—less for maintenance, more for mission-critical moments.

Raw, unfiltered fiber power—that’s NOW Psyllium Husk in a nutshell. With 6 grams of soluble fiber per tablespoon, it’s a no-frills, high-impact solution for those who want maximum bulk with minimal additives. It’s the gold standard for bowel regularity, forming a gel-like mass that moves waste efficiently through the colon. For anyone battling chronic constipation, this is the closest thing to a reset button.

In real use, it demands respect: mix it quickly in at least 12 oz of liquid and drink immediately, or risk a thick, gummy texture. It’s not subtle—you feel it working, which can be a pro or con depending on your goals. It lacks flavor or added nutrients, but that’s the point: pure, plant-based fiber, Non-GMO Project Verified and vegan-friendly. It’s not ideal for on-the-go use, but at home, it’s unbeatable for effectiveness.

Compared to Benefiber or Metamucil, NOW’s version skips the flavoring and marketing fluff, delivering more fiber per dollar. It’s the ultimate budget workhorse—especially when contrasted with pricier, feature-packed blends like Belli Welli or GOBIOTIX. While it doesn’t support GLP-1 like Supergut, it dominates in bulk formation and cost efficiency, making it the top pick for value-focused users who prioritize results over refinement.

This is fiber with a mission—detox. Garden of Life’s DetoxiFiber blends organic chia, flax, pea hulls, alfalfa, and barley grass into a plant-powered cleanse that feels more like whole-food nutrition than supplementation. With 5 grams of fiber per serving (4g insoluble, 1g soluble), it’s built to sweep toxins and support daily internal cleansing, not just digestion. For those wary of synthetic ingredients, this USDA Organic, psyllium-free formula is a breath of fresh air.

In practice, it delivers a gentle but persistent push—perfect for daily maintenance without cramping or urgency. The insoluble fiber content adds bulk efficiently, making it excellent for sluggish bowels. It mixes well into smoothies or yogurt, though it can settle if not stirred frequently. Unlike fast-acting psyllium, it works cumulatively, making it better for long-term gut hygiene than immediate relief.

Next to Micro Ingredients’ triple blend, DetoxiFiber is less concentrated but more holistic, prioritizing organic sourcing and detox mechanics over sheer fiber volume. It’s ideal for clean-living advocates, those on plant-based diets, or anyone doing seasonal resets. While it doesn’t target GLP-1 like Supergut, it outshines others in whole-food integrity and toxin-binding capacity, offering a purer path to digestive wellness.

The legend lives on—Metamucil remains the most trusted name in fiber for good reason. Its psyllium husk base delivers 3 grams of soluble fiber per serving, working to support not just digestion, but heart health, blood sugar balance, and appetite control. With a smooth orange flavor and sugar-free formula, it’s palatable enough for daily use without the medicinal aftertaste of plain powders. It’s the all-rounder that doctors recommend—and millions rely on.

In real-world testing, it forms a light gel that moves smoothly through the gut, promoting regularity without urgency. The orange flavor masks the earthiness of psyllium well, making it a favorite for those who dread their fiber routine. It’s best taken with plenty of water, and while it can clump if not mixed fast, a shaker cup solves that. It’s not the most advanced for GLP-1 support, but it covers the basics exceptionally well.

Versus NOW Psyllium, Metamucil offers better taste and broader health claims, though at a higher cost per gram. Compared to Benefiber, it delivers more substantial bulk and proven heart health benefits. It’s the goldilocks of fiber powders—not the cheapest, not the most innovative, but reliably effective. For anyone new to supplementation or seeking a proven, multi-benefit option, it’s the safest starting point.

Silky, silent, and smart—GOBIOTIX is fiber reimagined for modern diets. Free from psyllium, it uses a clean, soluble fiber base that dissolves instantly in coffee, smoothies, or water with zero grit or gel formation. That makes it a keto and low-carb favorite, especially for those who hate the thick texture of traditional fiber powders. It’s designed for debloating and daily gut balance, not just bowel movement.

In daily use, it’s the most discreet fiber experience available—no aftertaste, no texture, no digestive rumbling. It supports GLP-1 activity subtly, helping with mild appetite control without the intensity of Flatter Me. Each serving is light on volume but consistent in effect, ideal for long-term integration. It won’t rescue you from severe constipation, but it prevents it with quiet efficiency.

Compared to Supergut, GOBIOTIX is less focused on metabolic spikes and more on seamless lifestyle fit. It lacks resistant starch but wins on versatility and mixability. For coffee drinkers or smoothie lovers, it’s the easiest fiber to forget you’re taking—yet still feel the benefits. It costs more than NOW Psyllium, but delivers a far smoother, diet-friendly experience.

This is fiber in bulk—literally and figuratively. Micro Ingredients’ 2-pound tub delivers a 3-in-1 blend of chicory root inulin, acacia, and psyllium husks, offering both soluble and insoluble fiber in one powerhouse mix. With 8 grams of fiber per serving, it’s built for deep digestive support, nourishing gut flora while promoting regular transit. For serious fiber seekers, this is the ultimate value play.

In practice, it performs like a digestive Swiss Army knife—inulin feeds probiotics, acacia soothes the gut lining, and psyllium adds bulk. It mixes well with vigorous shaking and works best in smoothies or protein shakes. Some users may experience gas initially due to inulin fermentation, but tolerance builds over time. It’s not the gentlest for sensitive systems, but for those who want maximum impact, it delivers.

Stacked against Garden of Life, it offers higher fiber concentration and better value per gram, though with less emphasis on detox. Compared to Belli Welli, it lacks collagen and electrolytes but wins on fiber density and cost efficiency. It’s the top pick for long-term users, bulk supplementers, or anyone who wants one powder to rule them all. It doesn’t match Supergut in GLP-1 focus, but dominates in volume, variety, and overall gut nourishment.