According to the product label, the main Microplastic Protect ingredients are 99% pure chitosan oligosaccharide 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 pairs a positively chargeable mushroom-derived polymer with two polysaccharides from seaweed and sugar beet. This guide explains what each ingredient is, what role it plays, what the label does not establish on its own, and which questions are worth asking before you buy any supplement of this kind.
Key Takeaways
- The label lists chitosan oligosaccharide (COS) from button mushrooms, sodium alginate, beet pectin, microcrystalline cellulose and a vegetarian cellulose capsule.
- One serving is two capsules weighing 1,200 mg in total, with 60 servings per bottle.
- The Supplement Facts panel does not give a separate milligram amount for each ingredient, so the 1,200 mg should not be read as 1,200 mg of chitosan oligosaccharide.
- Chitosan, alginate and pectin can interact through opposite electrical charges in laboratory settings, but that is a formulation concept, not proof of a human health outcome.
- “99% pure” describes the purity of the chitosan ingredient, not the share of the whole capsule.
The Formula at a Glance
| 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 | Filler or formulation aid for consistent capsule filling |
| Cellulose capsule | Plant-derived capsule material | Vegetarian capsule shell |
The label states that a serving is two capsules weighing 1,200 mg in total, and each bottle holds 120 capsules, or 60 servings.
Ingredient One: Mushroom-Derived Chitosan Oligosaccharide
The central ingredient is listed as 99% pure chitosan oligosaccharide from Agaricus bisporus mushrooms. Agaricus bisporus includes the common white button mushroom, and its cell walls contain chitin, the same structural polysaccharide found in crustacean shells.
To make the ingredient, chitin-containing material is separated from the mushroom biomass and purified. Deacetylation converts the chitin into chitosan, and further controlled processing shortens the chains into chitosan oligosaccharides (COS). Research confirms that Agaricus bisporus can serve as a recoverable chitin source for fungal chitosan (Almeida et al., 2025). Learn more in our guide to button mushroom-derived chitosan and on our chitosan oligosaccharide product page.
Chitosan Oligosaccharide Is Not Mushroom Powder
The word “mushroom” can suggest dried culinary mushroom powder. That is not what the ingredient statement describes. Mushroom powder contains proteins, carbohydrates, glucans, minerals and many other components. Chitosan oligosaccharide is a processed and purified polymer obtained from mushroom cell-wall material, which makes it different from both mushroom powder and conventional mushroom extracts.
The “99% pure” statement refers to the purity specification of the chitosan ingredient. It does not mean 99% of the capsule contents is chitosan unless the quantitative Supplement Facts information says so.
Why Oligosaccharide Instead of Longer-Chain Chitosan?
Native chitosan generally consists of long polymer chains, while COS has shorter chains and a lower molecular weight. That change can influence water solubility, viscosity, molecular mobility, dispersion, surface interactions and behavior across pH conditions. A major scientific overview notes that solubility depends on chain length, degree of acetylation, pH and formulation conditions (Aranaz et al., 2021).
Higher solubility does not automatically mean better performance for every purpose, because longer and shorter chains can differ in adsorption and bridging behavior. Our full comparison of chitosan vs chitosan oligosaccharide explains the trade-offs.
The Charge Question
Chitosan has amino groups that can accept hydrogen ions under suitable conditions. Once protonated, they carry a positive charge that can support electrostatic attraction to compatible negatively charged materials. The mechanism is more nuanced than “positive sticks to negative,” because the outcome depends on:
- pH
- Degree of deacetylation
- Molecular weight
- Particle size
- Ionic strength
- Surface chemistry
- Concentration
- Competing substances in the surrounding medium
A charge figure such as zeta potential is only meaningful with its test method, pH, solvent and concentration. Our explainer on how the positive charge of chitosan works covers the protonation mechanism.
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, raise viscosity and form gels under suitable conditions. Alginate carries negatively charged carboxyl groups, and its behavior changes with molecular composition, concentration, pH, mineral content, calcium ions and viscosity grade.
Calcium ions can link sections of alginate chains into a network or gel, which is one reason alginate is used in food, encapsulation, pharmaceutical and biomaterial applications. A review in the scientific literature describes its structure, physicochemical properties and wide use across food and biomedical formulations (Abka-khajouei et al., 2022).
Inside a capsule formula, sodium alginate may contribute water-interaction and formulation properties. It should not be described as removing microplastics from the body on its own, and results for isolated alginate in a laboratory cannot predict how a multi-ingredient capsule behaves during human digestion.
Ingredient Three: Beet Pectin
Pectin is a complex polysaccharide found in plant cell walls. Commercial pectin is usually associated with citrus peel and apple pomace, but it can also be recovered from sugar beet. A review of pectin describes its role as a dietary-fiber material and its use as a gelling agent, thickener, stabilizer and emulsifier (Lara-Espinoza et al., 2018).
Sugar beet pectin behaves differently from citrus pectin. Technical literature notes that beet pectin has weak gelling ability compared with citrus pectin but good emulsifying properties (The Analytical Scientist), and research on beet by-products shows that its structure and properties vary with the extraction method (Pacheco et al., 2019). In this formula, beet pectin is best described as a plant-derived polysaccharide and soluble-fiber component. It should not be assumed to form a gel or matrix after swallowing without finished-product testing.
How Might the Three Polymers Interact?
This is the most interesting part of the ingredient list. Chitosan is positively charged at low pH, while alginate and pectin contain negatively charged carboxyl groups. Reviews of chitosan-based polyelectrolyte complexes describe how chitosan associates with negatively charged natural polymers, including alginate and pectin, and how factors such as pH and polymer ratio influence the complexes that form (Mustafa et al., review of chitosan polyelectrolyte complexes; MDPI Polymers review).
Conceptually, that suggests several possibilities:
- Chitosan may be attracted to negatively charged groups on alginate or pectin.
- The polymers may form a temporary network or complex.
- Water absorption can change mobility and viscosity.
- pH, salts and digestive contents can alter every interaction.
- Other molecules and particles may compete for binding sites.
These are plausible formulation concepts, not proof of what the finished supplement does in people. Most polyelectrolyte research studies drug-delivery and biomaterial settings, not dietary supplements. Behavior of the complete formula at the labeled serving would need to be tested under simulated digestion or in clinical research.
Ingredient Four: Microcrystalline Cellulose
Microcrystalline cellulose (MCC) is a refined cellulose widely used in tablets and capsules. Its usual roles are to give consistent fill volume, support powder flow, help distribute ingredients evenly and improve capsule weight uniformity. In this product it is a formulation aid rather than the main functional ingredient. Small amounts of concentrated ingredients often need a carrier or filler so each capsule fills consistently, so its presence is not unusual.
Ingredient Five: Cellulose Vegetarian Capsule
The capsule shell is cellulose-based and vegetarian. Many traditional capsules use animal-derived gelatin, so a cellulose capsule provides a non-gelatin format that fits the mushroom-derived positioning. The shell holds the powder and dissolves after swallowing, and it should not be confused with the active chitosan ingredient inside.
The fungal source and cellulose capsule also set this product apart from conventional crustacean-derived chitosan supplements. For a closer look, read whether mushroom chitosan is vegan and shellfish-free, or compare vegetal origin with shellfish origin.
What Is Not in the Formula?
According to the label, the product is made without shellfish, gluten, eggs, nuts, preservatives, artificial colors and artificial flavors. The shellfish point matters because much commercial chitosan comes from shrimp or crab shells, while this product names button mushrooms as its source.
People with serious allergies should read the full allergen statement and contact the manufacturer about shared facilities, supplier controls or cross-contact testing. Consumer references also advise caution with chitosan for people with shellfish or mushroom allergies (Healthline), so anyone with a mushroom allergy should speak with a healthcare professional first.
What Does One Serving Contain?
The label defines one serving as 2 capsules, 1,200 mg in total. A bottle holds 120 vegetarian capsules, which is 60 servings at two capsules each.
The label does not currently show an individual milligram amount for chitosan oligosaccharide, sodium alginate or beet pectin. As a result, the share of the 1,200 mg that belongs to each cannot be calculated from the visible label. FDA labeling guidance explains that dietary ingredients and their quantities generally belong in the Supplement Facts panel, with other ingredients such as fillers listed beneath it (FDA Dietary Supplement Labeling Guide). Shoppers who want per-ingredient quantities can request them from the manufacturer.
How Is the Formula Taken?
The label directions say to take two capsules, 1,200 mg in total, about 15 minutes before the two biggest meals of the day. That timing places the formula in the digestive system around meals. It does not prove the ingredients interact with every substance in a meal, because food composition, stomach conditions, dosage and individual digestion all matter. Our guide on how to take Microplastic Protect explains the schedule, and you should not exceed the labeled directions unless a healthcare professional advises it.
Safety and Interaction Considerations
General references on chitosan supplements list constipation, gas, bloating and nausea as common side effects (MedicineNet). WebMD also notes that chitosan may interfere with blood thinners such as warfarin and may reduce absorption of fat-soluble vitamins (WebMD). These references address chitosan broadly, and they may not describe this exact formula, but they show why it is sensible to ask a pharmacist or doctor about timing and interactions, especially if you take medication, are pregnant or breastfeeding, or have a diagnosed allergy.
What the Formula Is Designed to Do, and What Remains Unproven
The product is built around a material-science idea:
- Chitosan oligosaccharide supplies a mushroom-derived polymer that can become positively charged.
- Sodium alginate supplies a negatively charged, water-responsive polysaccharide.
- Beet pectin adds a plant-derived soluble fiber.
- The capsule delivers the ingredients around mealtime.
Laboratory chemistry can explain why these materials may interact with each other and with compatible surfaces. It cannot, on its own, show that the supplement removes microplastics, PFAS or heavy metals from the human body. Microplastics differ by polymer, size, shape, surface charge, weathering and chemical coating, and PFAS and metals have entirely different chemistry. Any claim across those materials needs direct evidence from the finished product, not just evidence about one isolated ingredient.
To see where research stands, read whether chitosan can bind microplastics, our review of the chitosan microplastic excretion study, and what we actually know about microplastics and human health.
How to Evaluate a Formula Like This
Ask five questions before judging any supplement.
Is the Ingredient Identity Clear?
The label should distinguish chitosan oligosaccharide from native chitosan, chitin and ordinary mushroom powder.
Is the Source Documented?
Here the label names Agaricus bisporus button mushrooms rather than shellfish.
Are the Quantities Disclosed?
A complete Supplement Facts panel should show how much of each dietary ingredient a serving supplies.
Are Product-Specific Test Results Available?
Ingredient studies and finished-product testing are not interchangeable. Certificates of analysis and specifications are available through our document library.
Are the Claims Proportionate to the Evidence?
Words like “supports” or “designed to interact” signal a different level of certainty than “removes” or “eliminates.”
Reading the Formula With Realistic Expectations
Microplastic Protect combines button mushroom-derived chitosan oligosaccharide, sodium alginate and beet pectin in vegetarian capsules for use around the two largest meals of the day. The design rests on charge, water interaction and polymer chemistry, which is scientifically interesting, but ingredient properties are not proof of a health outcome. The most reliable way to judge a product is to combine transparent labeling, clear ingredient quantities, analytical specifications and finished-product evidence.
You can view the Microplastic Protect product page for the current label, suggested use and purchasing information. Dietary supplements should complement, not replace, practical exposure-reduction steps, a balanced diet and appropriate medical care. This article is for education and is not medical advice.
Frequently Asked Questions
What are the ingredients in Microplastic Protect?
The label lists 99% pure chitosan oligosaccharide from Agaricus bisporus mushrooms, sodium alginate and beet pectin, plus microcrystalline cellulose and a cellulose vegetarian capsule.
Is Microplastic Protect made with chitosan or chitosan oligosaccharide?
The Supplement Facts panel identifies the main ingredient as chitosan oligosaccharide, a shorter-chain form of chitosan. Our guide on chitosan vs chitosan oligosaccharide explains how the two differ.
Does “99% pure” mean 99% of the capsule is chitosan?
No. It describes the purity of the chitosan oligosaccharide ingredient. The label does not separately state the amount of each component.
What is chitosan oligosaccharide?
It is a short-chain form of chitosan made by breaking chitosan into smaller fragments. It is generally more water-soluble and less viscous than native chitosan.
What does sodium alginate do in a supplement?
Sodium alginate is a seaweed-derived polysaccharide that absorbs water, increases viscosity and can form gels under the right conditions. Its exact contribution in a finished capsule requires product-specific testing.
What is beet pectin?
Beet pectin is a pectin recovered from sugar beet. It differs from citrus and apple pectin, generally showing weaker gelling but good emulsifying behavior, and it is included here as a plant-derived soluble fiber.
Can chitosan and alginate be combined?
Yes, they are widely studied together. Because chitosan can carry a positive charge and alginate a negative one, the two can form polyelectrolyte complexes under suitable conditions. How they behave in a capsule inside the digestive tract has to be tested for the specific formula.
Why is microcrystalline cellulose in supplements?
It acts as a filler and flow aid that helps capsules fill evenly. It is a formulation aid, not the main active ingredient in this product.
Are Microplastic Protect capsules vegan or vegetarian?
The label identifies a cellulose vegetarian capsule rather than animal-derived gelatin.
Is Microplastic Protect shellfish-free?
The label states it is made without shellfish and identifies button mushrooms as the chitosan source. People with serious allergies should still review the allergen statement and ask about cross-contact controls.
Is Microplastic Protect gluten-free?
The label states it is made without gluten. As with any allergen claim, check the current bottle and contact the manufacturer with specific questions.
How much is in one serving and one bottle?
One serving is two capsules, 1,200 mg in total. Each bottle holds 120 capsules, or 60 servings.
How do you take Microplastic Protect?
The label directs two capsules about 15 minutes before the two biggest meals of the day. Do not exceed the labeled directions unless a healthcare professional advises it.
Does Microplastic Protect remove microplastics from the body?
No claim of removal can be made from the ingredient list. The ingredients provide a scientific basis for studying charge and polymer interactions, but effects in people need finished-product research.
Does chitosan have side effects or interactions with medication?
General references list constipation, gas and bloating as common side effects, and chitosan may interact with warfarin and affect fat-soluble vitamin absorption. Speak with a healthcare professional before use, especially if you take medication, are pregnant or breastfeeding, or have a shellfish or mushroom allergy.
Where can I find certificates of analysis or specifications?
Technical documents are listed in the Chitosan Global document library, and our team can answer questions about specifications and documentation.
Talk to the Chitosan Global Team
Have questions about the Microplastic Protect formula, ingredient specifications or documentation? Our technical team can help with product information, origin, molecular weight and degree of deacetylation, samples and bulk supply.
- Call us on +1 (423) 202-6145
- Email your questions to steve@chitosanglobal.com
- Request wholesale pricing or contact our team to book a free initial consultation