A supplement bottle can make several promises on its front label. The more useful information, however, is usually found on the back.
According to the product label, the principal Microplastic Protect ingredients are 99% pure chitosan oligosaccharide derived from Agaricus bisporus button mushrooms, sodium alginate and beet pectin. The formula also uses microcrystalline cellulose and a cellulose-based vegetarian capsule.
That makes it more than a single-ingredient chitosan supplement. It combines a positively charged mushroom-derived polymer with two plant- or algae-derived polysaccharides selected for their complementary material properties.
Let’s open the formula conceptually and examine what each ingredient contributes and what the label does not establish on its own.
The Formula in One View
| Label component | Source or type | Role in the formula |
|---|---|---|
| Chitosan oligosaccharide | Agaricus bisporus button mushrooms | Principal mushroom-derived chitosan ingredient |
| Sodium alginate | Commonly obtained from brown seaweed | Polysaccharide with water-binding and gel-forming properties |
| Beet pectin | Derived from sugar-beet material | Plant polysaccharide and soluble-fiber component |
| Microcrystalline cellulose | Purified cellulose | Used in capsule manufacturing as a filler or formulation aid |
| Cellulose capsule | Plant-derived capsule material | Vegetarian capsule shell |
The label states that a serving is two capsules weighing 1,200 mg in total, with 60 servings per bottle.
However, the current Supplement Facts panel does not provide a separate milligram amount for each ingredient. Therefore, the 1,200 mg serving weight should not automatically be interpreted as 1,200 mg of chitosan oligosaccharide alone.
Ingredient One: Mushroom-Derived Chitosan Oligosaccharide
The central ingredient in the formula is listed as:
99% Pure Chitosan Oligosaccharide from Agaricus bisporus Mushrooms
Agaricus bisporus is the species that includes the common white button mushroom. Its cell walls contain chitin, a structural polysaccharide also found in crustacean shells and other natural sources.
During manufacturing, chitin-containing material is separated from the mushroom biomass and purified. Deacetylation converts the recovered chitin into chitosan. Further controlled processing can reduce the polymer into shorter chains known as chitosan oligosaccharides, or COS.
Research has demonstrated that Agaricus bisporus can serve as a recoverable source of chitin for fungal chitosan production (Almeida et al., 2025).
You can explore the source in more detail in our guide to button mushroom-derived chitosan.
Chitosan Oligosaccharide Is Not Ordinary Mushroom Powder
The word “mushroom” can create the impression that the capsule contains dried culinary mushroom powder. That is not what the ingredient statement describes.
Mushroom powder may contain proteins, carbohydrates, glucans, minerals and numerous other naturally occurring components.
Chitosan oligosaccharide is a processed and purified polymer ingredient obtained from chitin-containing mushroom cell-wall material. It is chemically and functionally different from whole mushroom powder or a conventional mushroom extract.
The “99% pure” statement refers to the purity specification of the chitosan ingredient. It should not be interpreted as meaning that 99% of the entire capsule formula is chitosan unless the quantitative Supplement Facts information specifically confirms that composition.
Why Use Chitosan Oligosaccharide Instead of Longer-Chain Chitosan?
Native chitosan generally consists of relatively long polymer chains. Chitosan oligosaccharide contains shorter chains and has a lower molecular weight.
This change can influence:
- Water solubility
- Viscosity
- Molecular mobility
- Dispersion
- Surface interactions
- Behavior across different pH conditions
A major scientific review notes that chitosan oligomers can be soluble across a broader pH range than many longer-chain native chitosan materials. Solubility still depends on chain length, degree of acetylation and formulation conditions (Aranaz et al., 2021).
Greater solubility does not automatically mean greater performance in every application. Longer and shorter chitosan chains can exhibit different adsorption and bridging behavior.
Read our complete comparison of chitosan vs chitosan oligosaccharide supplements.
The Charge Question: Why Chitosan Is Included
Chitosan contains amino groups that can accept hydrogen ions under suitable conditions. Once protonated, these groups become positively charged.
This cationic behavior can support electrostatic attraction between chitosan and compatible negatively charged materials.
But the mechanism is more nuanced than “positive sticks to negative.” An interaction can be affected by:
- pH
- Degree of deacetylation
- Molecular weight
- Particle size
- Ionic strength
- Surface chemistry
- Concentration
- Competing substances in the surrounding medium
The label describes the chitosan as having a positive surface charge. A charge measurement such as a zeta-potential value is meaningful only when accompanied by the testing method, pH, solvent, concentration and other experimental conditions.
Our scientific explainer describes how the positive charge of chitosan works.
Ingredient Two: Sodium Alginate
Sodium alginate is a polysaccharide most commonly obtained from brown seaweed. It is widely used in food and formulation science because it can absorb water, increase viscosity and form gels under suitable conditions.
Alginate contains negatively charged carboxyl groups. Its behavior can change according to:
- Molecular composition
- Concentration
- pH
- Mineral content
- Presence of calcium ions
- Viscosity grade
- Surrounding formulation
Calcium ions can connect sections of alginate chains and create a network or gel. This well-known material property is one reason alginate is used in food, encapsulation, pharmaceutical and biomaterial applications.
A scientific review of alginate describes its structure, physicochemical properties and extensive use across food and biomedical formulations (Abka-khajouei et al., 2022).
What Might Sodium Alginate Contribute Here?
Within a capsule formula, sodium alginate may provide complementary water-interaction and formulation properties.
It should not be described as independently removing microplastics from the human body unless direct evidence from the finished product demonstrates that outcome.
The behavior of isolated sodium alginate in a laboratory study also cannot automatically predict how a multi-ingredient capsule performs during human digestion.
Ingredient Three: Beet Pectin
Pectin is a complex polysaccharide present in the cell walls of many plants. Commercial pectin is often associated with citrus peel and apple pomace, but it can also be recovered from sugar-beet material.
Beet pectin may have different structural characteristics from conventional citrus or apple pectin, including differences in:
- Degree of esterification
- Side-chain composition
- Molecular weight
- Protein-associated structures
- Gel-forming behavior
- Emulsification properties
Pectin is widely used because of its ability to interact with water and contribute to thickening, stabilization and gel formation.
A review of pectin describes it as an important dietary-fiber material and explains its use as a gelling agent, thickener, stabilizer and emulsifier (Lara-Espinoza et al., 2018).
Why Might Beet Pectin Be Included?
Beet pectin adds another polysaccharide component to the formula. Its water-binding and matrix-forming characteristics may complement alginate and chitosan oligosaccharide within the intended formulation.
That does not mean the three ingredients automatically form a specific structure after swallowing. Such a conclusion would require finished-product testing under relevant digestive conditions.
The responsible description is straightforward: beet pectin is a plant-derived polysaccharide included as part of the product’s multi-component formula.
How Might the Three Polymers Interact?
This is the most interesting part of the ingredient list.
Chitosan can carry a positive charge under suitable conditions, while alginate and pectin contain negatively charged carboxyl groups. In material-science applications, oppositely charged polymers can sometimes associate to form polyelectrolyte complexes.
Conceptually, this creates several possible interactions:
- Chitosan may be attracted to negatively charged groups on alginate or pectin.
- The polymers may create a temporary network or matrix.
- Water absorption can influence their mobility and viscosity.
- pH, salts and digestive contents can alter the interaction.
- Other molecules and particles may compete for available binding sites.
This is a plausible formulation concept not proof of what the finished supplement accomplishes in humans.
The actual behavior of Microplastic Protect would need to be evaluated using the complete formula at the labeled serving size under appropriately simulated or clinical conditions.
Ingredient Four: Microcrystalline Cellulose
Microcrystalline cellulose, commonly abbreviated as MCC, is a refined cellulose material widely used in tablets and capsules.
Its typical manufacturing roles include:
- Adding consistent fill volume
- Supporting powder flow
- Helping distribute ingredients evenly
- Improving manufacturing consistency
- Supporting capsule weight uniformity
MCC is generally considered a formulation aid rather than the principal functional ingredient in this product.
Its presence is not unusual. Small quantities of concentrated ingredients often require a suitable carrier or filler so that each capsule can be filled consistently.
Ingredient Five: Cellulose Vegetarian Capsule
The capsule shell is identified as cellulose and vegetarian.
This distinction matters because many traditional capsules are made from animal-derived gelatin. A cellulose capsule provides a non-gelatin delivery format that fits the product’s mushroom-derived positioning.
The cellulose shell holds the powdered formula and dissolves after being swallowed. It should not be confused with the active mushroom chitosan ingredient inside the capsule.
The fungal source and vegetarian capsule are also why this product can be positioned differently from conventional crustacean-derived chitosan supplements. Read whether mushroom chitosan is vegan and shellfish-free.
What Is Not Listed in the Formula?
According to the label, the product is made without:
- Shellfish
- Gluten
- Eggs
- Nuts
- Preservatives
- Artificial colors
- Artificial flavors
This is especially relevant because much of the world’s commercial chitosan is produced from shrimp or crab shells.
Microplastic Protect instead identifies Agaricus bisporus button mushrooms as the source of its chitosan oligosaccharide.
People with serious allergies should still evaluate the complete allergen statement and contact the manufacturer if they require information about shared facilities, supplier controls or cross-contact testing.
What Does One Serving Contain?
The label defines one serving as:
2 capsules — 1,200 mg total
Each bottle contains:
- 120 vegetarian capsules
- 60 servings
- Two capsules per serving
A critical detail is that the label does not currently show an individual milligram quantity for:
- Chitosan oligosaccharide
- Sodium alginate
- Beet pectin
Consequently, the exact proportion of the 1,200 mg serving assigned to each component cannot be calculated from the visible label.
FDA dietary-supplement labeling guidance states that the names and quantities of dietary ingredients generally belong in the Supplement Facts panel, while fillers and other non-dietary formulation ingredients are declared below it (FDA Dietary Supplement Labeling Guide).
Consumers who want exact per-ingredient quantities should request updated quantitative information from the manufacturer.
Why Is the Formula Taken Around Meals?
The directions state:
Take two capsules, totaling 1,200 mg, approximately 15 minutes before the two biggest meals of the day.
This timing places the formula in the digestive system around the period when food and drink are consumed.
It does not prove that the ingredients capture every contaminant associated with a meal. Food composition, timing, stomach conditions, dosage and individual digestive factors can all affect ingredient behavior.
For a practical explanation of the schedule, read how to take Microplastic Protect.
Do not exceed the labeled directions unless advised by an appropriate healthcare professional.
What the Formula Is Designed to Do—and What Remains Unproven
The product is built around a material-science concept:
- Chitosan oligosaccharide provides a mushroom-derived cationic polymer.
- Sodium alginate provides an anionic, water-responsive polysaccharide.
- Beet pectin adds a plant-derived fiber and matrix-forming component.
- The capsule delivers the ingredients around mealtime.
Laboratory chemistry can explain why these materials may interact with one another and with compatible surfaces.
It cannot, by itself, prove that the supplement removes microplastics, PFAS or heavy metals from humans.
Microplastics vary widely by polymer, size, shape, surface charge, weathering and chemical coating. PFAS compounds and metals also have entirely different chemical characteristics.
Any claim covering all these materials requires direct evidence from the finished product—not merely evidence about one isolated ingredient.
How to Evaluate the Formula Responsibly
Before judging any supplement, ask five questions:
Is the Ingredient Identity Clear?
The label should distinguish chitosan oligosaccharide from native chitosan, chitin and ordinary mushroom powder.
Is the Source Documented?
The label identifies Agaricus bisporus button mushrooms rather than shellfish.
Are the Quantities Disclosed?
A complete Supplement Facts panel should make it possible to understand how much of each dietary ingredient is supplied per serving.
Are Product-Specific Test Results Available?
Ingredient studies and finished-product testing are not interchangeable.
Are the Claims Proportionate to the Evidence?
Words such as “supports” or “designed to interact” communicate a different level of certainty from “removes,” “eliminates” or “protects.”
View the Complete Product
Microplastic Protect combines button mushroom-derived chitosan oligosaccharide, sodium alginate and beet pectin in vegetarian capsules intended for use around the two largest meals of the day.
You can view Microplastic Protect for the current label, suggested use and purchasing information.
Dietary supplements should complement—not replace—practical exposure-reduction measures, a balanced diet or appropriate medical care.
Frequently Asked Questions About Microplastic Protect Ingredients
What are the main Microplastic Protect ingredients?
The label lists 99% pure chitosan oligosaccharide derived from Agaricus bisporus mushrooms, sodium alginate and beet pectin. It also identifies microcrystalline cellulose and a cellulose vegetarian capsule.
Is the product made with native chitosan or chitosan oligosaccharide?
The Supplement Facts panel identifies the main ingredient as chitosan oligosaccharide. This is a shorter-chain form of chitosan.
Does “99% pure” mean 99% of the entire capsule is chitosan?
Not necessarily. It appears to describe the purity of the chitosan oligosaccharide ingredient. The label does not separately disclose the amount of each formula component.
How much is in one serving?
One serving consists of two capsules with a total stated weight of 1,200 mg.
Why are sodium alginate and beet pectin included?
They are water-interacting polysaccharides with gel-, fiber- or matrix-forming properties. Their precise contribution to the finished formula requires product-specific testing.
Is Microplastic Protect shellfish-free?
The label states that it is made without shellfish and identifies button mushrooms as the chitosan source.
Are the capsules vegetarian?
Yes. The label identifies a cellulose vegetarian capsule rather than an animal-derived gelatin capsule.
Does the formula contain artificial colors or flavors?
The label states that it is made without preservatives, artificial colors or artificial flavors.
Does the ingredient list prove that the product removes microplastics?
No. The ingredients provide a scientific basis for studying charge and polymer interactions, but human effectiveness must be established through appropriate finished-product research.
The Microplastic Protect ingredients reveal a more complex formula than the front of the bottle might suggest.
At its center is 99% pure button mushroom-derived chitosan oligosaccharide. Sodium alginate and beet pectin add two complementary polysaccharides, while microcrystalline cellulose and a vegetarian cellulose capsule support manufacturing and delivery.
The formula has a scientifically interesting design based on charge, water interaction and polymer chemistry. At the same time, ingredient properties should not be confused with proof of a human health outcome.
The strongest way to evaluate the product is to combine transparent labeling, clear ingredient quantities, analytical specifications and finished-product evidence.