Konsyl and Metamucil both contain the same active ingredient, psyllium husk, and they work the same way in your body. But they are not identical products. The key differences come down to concentration, added ingredients, and how much fiber you get per serving.
Same Active Ingredient, Different Concentrations
Both Konsyl and Metamucil are classified as bulk-producing fiber laxatives, and both use psyllium husk as their sole active ingredient. Psyllium absorbs water in your digestive tract, forming a gel that softens stool, promotes regularity, and can help lower cholesterol when used as part of a low-fat diet.
The concentration of psyllium differs between the two. Konsyl Original Formula is 100% psyllium husk: one teaspoon delivers a full 6 grams of psyllium with nothing else added. Metamucil’s standard powder contains both soluble and insoluble fiber, but a teaspoon provides roughly 3 grams of insoluble fiber and 2 grams of soluble fiber (about 5 grams total). When measured as a percentage of soluble fiber per serving, Konsyl packets come in around 60%, while Metamucil MultiHealth Fiber packets sit closer to 58%.
In practical terms, Konsyl Original is a more concentrated product. You’re getting more pure psyllium per scoop, which matters if you’re trying to hit a specific fiber target without extra volume.
What Else Is in the Powder
This is where the two brands diverge most noticeably. Konsyl Original Formula contains only psyllium husk. No sweeteners, no flavoring, no coloring. It’s a single-ingredient product.
Metamucil’s flavored versions include sweeteners (sugar or aspartame depending on the variety), citric acid, natural and artificial flavors, and coloring agents like Yellow 6. Metamucil does offer a “Sugar-Free” line, but even those versions contain maltodextrin and aspartame. If you’re looking for a psyllium supplement with absolutely nothing added, Konsyl Original is the cleaner label.
That said, Metamucil’s added flavoring exists for a reason. Plain psyllium husk mixed in water has a gritty, earthy taste that many people find unpleasant. The orange or berry flavoring in Metamucil makes the experience more tolerable for daily use. Konsyl also sells flavored versions (Konsyl-D, for example, includes dextrose as a sweetener), but its flagship product remains unflavored.
Fiber per Serving Comparison
According to UCSF Health’s fiber supplement guide, one teaspoon of Konsyl provides 6 grams of psyllium. One teaspoon of Metamucil provides approximately 5 grams of total fiber (split between soluble and insoluble). Serving sizes on the label may differ between products, so always check the specific variety you’re buying, but gram for gram, Konsyl Original packs more psyllium into a smaller dose.
This matters most if you’re using psyllium for cholesterol management. The FDA allows a heart health claim on psyllium products, but only when you consume at least 7 grams of soluble fiber from psyllium husk per day as part of a diet low in saturated fat and cholesterol. Each product must deliver at least 1.7 grams of soluble fiber per serving to qualify for this claim. Both brands meet that threshold, but reaching the 7-gram daily target requires fewer scoops with a higher-concentration product.
Who Each Product Suits Best
If you want pure psyllium with no additives, Konsyl Original is the better fit. It works well for people watching their sugar intake, those with sensitivities to artificial sweeteners, or anyone who prefers to mix their fiber into food (smoothies, oatmeal, yogurt) rather than drinking a flavored beverage. Because it contains no sugar or maltodextrin, it adds virtually zero carbohydrates beyond the fiber itself.
If taste is a barrier and you know you won’t stick with a plain powder, Metamucil’s flavored options make daily use easier. Consistency matters more than purity when it comes to fiber supplementation. A product you actually take every day will do more for you than one that sits in the cabinet.
Both products are gluten-free in their standard powder forms. Both can cause bloating and gas, especially when you start taking them. The standard advice is to begin with a smaller dose and increase gradually over a week or two, drinking plenty of water with each serving. Psyllium absorbs a significant amount of liquid, and taking it without enough water can cause it to swell in your throat or intestines uncomfortably.
Are They Interchangeable?
For most purposes, yes. Since the active ingredient is the same, switching between Konsyl and Metamucil won’t change the fundamental effect on your digestion or cholesterol. Medscape lists both under the same drug monograph. Your body doesn’t care which label is on the container.
The only adjustment you may need to make is the serving size. Because Konsyl Original is more concentrated, a teaspoon of Konsyl is not equivalent to a teaspoon of Metamucil. If you switch brands, check the label for the grams of psyllium per serving rather than relying on “one scoop” as a universal measure. Match the grams, not the scoops, and you’ll get the same results from either product.