Safety Profile
Known Safety Concerns
- Essentially inert -- GRAS status with minimal safety concerns
- May slightly reduce fat-soluble vitamin absorption at very high amounts
- Some individuals with celiac disease may react to MCC derived from wheat sources
- Bulk-forming laxative effect at very high doses
Contraindications
- Essentially inert -- GRAS status with minimal safety concerns
- May slightly reduce fat-soluble vitamin absorption at very high amounts
Interactions
Information not yet available for this ingredient profile.
Evidence and Scientific Findings
Ingredient Overview
Microcrystalline cellulose is a purified, partially depolymerized cellulose used as a filler, binder, and disintegrant in tablets and capsules. It is the most widely used tablet excipient globally. GRAS status. Non-toxic and not absorbed. May slightly reduce absorption of fat-soluble vitamins at very high doses due to its fiber-like properties. Generally considered inert and safe.
Biological and Chemical Classification
- Scientific Name
- Microcrystalline cellulose (MCC)
Mechanism of Action
Information not yet available for this ingredient profile.
Clinical Evidence of Effectiveness
Information not yet available for this ingredient profile.
Pharmacokinetics
Information not yet available for this ingredient profile.
Recommended Dosage
Information not yet available for this ingredient profile.
SETI — Scientific Evidence Transparency Index
Executive Summary — Ingredient Assessment
- 10 studies reviewed
- 0 high-quality studies (meta-analysis or RCT)
- Main clinical benefit observed: Excipient
- Evidence consistency: High consistency across studies (100%)
- Essentially inert -- GRAS status with minimal safety concerns
- May slightly reduce fat-soluble vitamin absorption at very high amounts
- Some individuals with celiac disease may react to MCC derived from wheat sources
- Bulk-forming laxative effect at very high doses
The available scientific evidence for Microcrystalline Cellulose indicates notable safety signals that warrant caution. Use should be considered carefully and monitored, particularly in sensitive populations or alongside other medications.
Total SETI Score
High risk| Evidence quality | 10/40 |
| Evidence consistency | 20/20 |
| Safety signals | 0/20 |
| Study recency | 10/10 |
| Evidence transparency | 10/10 |
Evidence Summary
- 10 studies reviewed
- 0 high-quality studies (meta-analysis or systematic review)
- 0 studies identified benefits or no safety concern (GREEN)
- 10 studies reported limited or advisory safety evidence (YELLOW)
Evidence Policy
Only peer-reviewed scientific literature indexed in PubMed or comparable databases is included in this evaluation. Commercial websites, blogs, and marketing materials are excluded. All references include direct traceable links to source documents.
Last updated: 24 მარ 2026, 09:20
Evidence Distribution
-
Observational / other LOW evidence YELLOWMixed Food Waste as a Low-Cost Carbon Source for Kombucha Bacterial Cellulose. ↗Alidu M et al.. Mixed Food Waste as a Low-Cost Carbon Source for Kombucha Bacterial Cellulose.. ACS Omega. 2026. PMID:41867619.PMID 41867619 ↗Journal ACS OmegaYear 2026Study type Observational / otherEvidence strength LOW evidencePubMed link https://pubmed.ncbi.nlm.nih.gov/41867619/
-
Observational / other LOW evidence YELLOWIonic liquid assisted gel casting of cellulose BSG protein mixtures for packaging films. ↗Bay D et al.. Ionic liquid assisted gel casting of cellulose BSG protein mixtures for packaging films.. Philos Trans A Math Phys Eng Sci. 2026. PMID:41848654.PMID 41848654 ↗Journal Philos Trans A Math Phys Eng SciYear 2026Study type Observational / otherEvidence strength LOW evidencePubMed link https://pubmed.ncbi.nlm.nih.gov/41848654/
-
Observational / other LOW evidence YELLOWImpact of excipient composition and environmental humidity on the physicochemical properties of ondansetron orally disintegrating tablets: experimental and molecular simulation study. ↗Aldabet A. Impact of excipient composition and environmental humidity on the physicochemical properties of ondansetron orally disintegrating tablets: experimental and molecular simulation study.. J Mol Model. 2026. PMID:41806002.PMID 41806002 ↗Journal J Mol ModelYear 2026Study type Observational / otherEvidence strength LOW evidencePubMed link https://pubmed.ncbi.nlm.nih.gov/41806002/
-
Observational / other LOW evidence YELLOWDiscovery and functional characterization of endoglucanases from Coptotermes formosanus with enhanced cellulose hydrolysis via yeast surface display. ↗Sun J et al.. Discovery and functional characterization of endoglucanases from Coptotermes formosanus with enhanced cellulose hydrolysis via yeast surface display.. Appl Environ Microbiol. 2026. PMID:41769998.PMID 41769998 ↗Journal Appl Environ MicrobiolYear 2026Study type Observational / otherEvidence strength LOW evidencePubMed link https://pubmed.ncbi.nlm.nih.gov/41769998/
-
Observational / other LOW evidence YELLOWUnderstanding real-time water penetration dynamics in tablets using synchrotron X-ray micro-computed tomography. ↗Kalugin D et al.. Understanding real-time water penetration dynamics in tablets using synchrotron X-ray micro-computed tomography.. J Pharm Sci. 2026. PMID:41759974.PMID 41759974 ↗Journal J Pharm SciYear 2026Study type Observational / otherEvidence strength LOW evidencePubMed link https://pubmed.ncbi.nlm.nih.gov/41759974/
-
Observational / other LOW evidence YELLOWSustainable gellan gum/microcrystalline cellulose foams: Preparation, characterization, and acoustic performance. ↗Khosravipour M et al.. Sustainable gellan gum/microcrystalline cellulose foams: Preparation, characterization, and acoustic performance.. Int J Biol Macromol. 2026. PMID:41759848.PMID 41759848 ↗Journal Int J Biol MacromolYear 2026Study type Observational / otherEvidence strength LOW evidencePubMed link https://pubmed.ncbi.nlm.nih.gov/41759848/
-
Observational / other LOW evidence YELLOWLiquid Deposition Modeling of Biobased Epoxy Composites: Natural Fillers as Rheology Modifiers and Reinforcements. ↗Albertini E et al.. Liquid Deposition Modeling of Biobased Epoxy Composites: Natural Fillers as Rheology Modifiers and Reinforcements.. ACS Omega. 2026. PMID:41726643.PMID 41726643 ↗Journal ACS OmegaYear 2026Study type Observational / otherEvidence strength LOW evidencePubMed link https://pubmed.ncbi.nlm.nih.gov/41726643/
-
Observational / other LOW evidence YELLOWMultifunctional starch-based composite film with methylcellulose and tannic acid for extending shelf life of fresh-cut pears. ↗Li C et al.. Multifunctional starch-based composite film with methylcellulose and tannic acid for extending shelf life of fresh-cut pears.. Int J Biol Macromol. 2026. PMID:41720377.PMID 41720377 ↗Journal Int J Biol MacromolYear 2026Study type Observational / otherEvidence strength LOW evidencePubMed link https://pubmed.ncbi.nlm.nih.gov/41720377/
-
Observational / other LOW evidence YELLOWSelecting Hydrogel Films Composed of Carboxymethyl Cellulose and Microcrystalline Cellulose From OPEFB With Citric Acid as a Green Crosslinker for Fruit Wrapping. ↗Susi S et al.. Selecting Hydrogel Films Composed of Carboxymethyl Cellulose and Microcrystalline Cellulose From OPEFB With Citric Acid as a Green Crosslinker for Fruit Wrapping.. Int J Biomater. 2026. PMID:41710777.PMID 41710777 ↗Journal Int J BiomaterYear 2026Study type Observational / otherEvidence strength LOW evidencePubMed link https://pubmed.ncbi.nlm.nih.gov/41710777/
-
Observational / other LOW evidence YELLOWCellulose nanofiber and soy protein isolate synergistically enhance freeze-thaw, storage, and photostability of Pickering emulsions. ↗Chen K et al.. Cellulose nanofiber and soy protein isolate synergistically enhance freeze-thaw, storage, and photostability of Pickering emulsions.. Food Chem. 2026. PMID:41707259.PMID 41707259 ↗Journal Food ChemYear 2026Study type Observational / otherEvidence strength LOW evidencePubMed link https://pubmed.ncbi.nlm.nih.gov/41707259/
Score Transparency
0 of 10 approved references (score saturates at 10). More peer-reviewed studies = stronger evidence base.
Method: Q = number of approved references ÷ 10 (capped at 1.0)
Limited — mostly case reports or animal studies
Method: L = mean study-level weight across approved references. Level 1 (meta-analysis / systematic review) = 1.0; Level 2 (RCT) = 0.8; Level 3 (cohort/case-control) = 0.6; Level 4 (case report) = 0.4; Level 5 (animal / in-vitro) = 0.2.
Mixed or neutral — roughly equal benefit and risk signals
Method: D = (sum of risk-scored references − sum of benefit-scored references) ÷ total evidence score, then scaled from [−1, 1] to [0, 1]. 0.0 = pure benefit; 0.5 = neutral; 1.0 = pure risk.
One or more monitoring-level safety signals active
Method: S = 0.5 (neutral baseline) + sum of active signal severity deltas ÷ 10. Severity deltas: Critical = +2.0, High = +1.5, Moderate = +1.0, Low = +0.5. Capped at 1.0.
Final GIRI Score for Microcrystalline Cellulose. Risk level thresholds: Low 0–3.0 · Moderate 3.0–5.5 · High 5.5–7.5 · Critical 7.5–10.
Full methodology & data sources
The GIRI Score is computed entirely from structured data — no editorial scoring or subjective weighting is applied at any step.
- References: Only approved references are counted. Each reference is assigned an evidence level (L1–L5) and a direction (risk / neutral / benefit) by the reference manager or AI classifier.
- Safety Signals: Sourced from regulatory agencies (FDA, EMA, Health Canada, TGA, and others) and pharmacovigilance databases. Only active signals count toward the score.
- Formula version: GIRI Score v3.7.0 — Q × L × D × S × 10.
- Limitations: The score reflects published evidence and recorded signals as of the last update date. It is not a clinical risk assessment and should not replace advice from a qualified healthcare professional.
Risk Level Classification
Based on available regulatory signals and scientific evidence, this ingredient presents a low safety concern under normal conditions of use.
0–3.0
3.0–5.5
5.5–7.5
7.5–10
The score pin shows exactly where this ingredient falls on the fixed risk scale.
What drove the Low classification for Microcrystalline Cellulose
A score of 1.0 places this ingredient in the Low band. Thresholds: Low 0–3.0 · Moderate 3.0–5.5 · High 5.5–7.5 · Critical 7.5–10.
0 approved references.
Limited — mostly case reports or animal studies (Level 4–5).
Neutral or mixed — benefit and risk signals roughly balanced.
No active signals — S component is at neutral baseline (0.5), contributing no extra risk weight.
No major regulatory restrictions or advisories recorded across monitored jurisdictions (FDA, EMA, Health Canada, TGA, and others).
How are the Low / Moderate / High / Critical thresholds defined?
The four risk levels are fixed score bands. A score is assigned to exactly one level based on where it falls:
| Level | Score | Meaning |
|---|---|---|
| LOW | 0.0 – 2.9 | Sparse or predominantly beneficial evidence. No active safety alerts. |
| MODERATE | 3.0 – 5.4 | Mixed signals — some risk alongside benefit. Caution at high doses or in sensitive groups. |
| HIGH | 5.5 – 7.4 | Multiple studies or regulatory alerts documenting adverse effects. Professional oversight recommended. |
| CRITICAL | 7.5 – 10 | Regulatory restrictions in one or more major jurisdictions. Serious documented harm. Avoid without specialist supervision. |
Thresholds are fixed constants (GIRI_Score_Utils::LEVEL_THRESHOLDS). They do not change per ingredient and are never subject to editorial adjustment.