Last verified: 17 days ago
Titanium Dioxide
Also known as: TiO2, titanium(IV) oxide, nano-TiO2, titanium dioxide nanoparticles, N-TiO2
Evidence under review. — Not yet rated
Industrial compound used in dental materials and coatings. Not a dietary supplement. Safety concerns exist.
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What it does
Titanium dioxide (TiO2) is a white inorganic compound used primarily as a pigment, UV filter, and photocatalyst. In the provided research, it appears almost exclusively as a component of dental...
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Evidence quality
Evidence base hasn't been formally rated yet. See research below.
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Clinical dose
No established dose for oral supplementation
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Found in
What the Science Says
Titanium dioxide (TiO2) is a white inorganic compound used primarily as a pigment, UV filter, and photocatalyst. In the provided research, it appears almost exclusively as a component of dental materials — including orthodontic appliances, tooth-whitening gels, dental adhesives, and toothpaste — where it shows antibacterial and photocatalytic properties. It is not studied as an oral dietary supplement in any of the provided papers, and its presence in supplement products (1,000 registered in NIH DSLD) is typically as a colorant or excipient, not an active ingredient.
What It Doesn't Do
Not a health supplement. No evidence it provides any nutritional benefit when consumed. Not a detox agent. Not an antioxidant for human use. The antibacterial effects shown in studies are for dental devices and coatings — not for swallowing. Animal and lab studies raise serious safety concerns about internal exposure.
Evidence-Based Benefits
Reduces bacterial growth under orthodontic appliances when incorporated into acrylic baseplates at 1% concentration.
Weak EvidenceEffective at: 1% concentration in acrylic dental material
Supporting studies (click to view on PubMed):
Nitrogen-doped TiO2 in whitening gels, activated by LED/laser, produces measurable tooth color improvement with low sensitivity.
Moderate EvidenceEffective at: Used in 6–15% hydrogen peroxide gel formulations
Supporting studies (click to view on PubMed):
A TiO2-electrode toothbrush reduced plaque index scores compared to a standard toothbrush in a nursing home trial.
Weak EvidenceEffective at: Topical use via photocatalytic toothbrush
Supporting studies (click to view on PubMed):
Absorption & Bioavailability
Unknown for oral ingestion in humans. Nanoparticle forms may penetrate tissues and accumulate in organs based on toxicology data. No human absorption studies provided.
Red Flags to Watch For
- Toxicology data from provided studies shows nano-TiO2 disrupts reproductive hormones and causes tissue damage in animal models
- Mitochondrial toxicity research links TiO2 nanoparticles to oxidative stress, DNA damage, and cell death pathways
- Classified as a possible carcinogen (Group 2B) by IARC when inhaled — not a safe ingredient to consume
- Presence in 1,000+ supplement products is as a colorant/excipient, not a therapeutic ingredient — its inclusion adds no health benefit
- Combined exposure with other compounds (e.g., carbamazepine) shown to worsen reproductive toxicity in animal studies
- No clinical trials in the provided data evaluate TiO2 as an oral dietary supplement for any health outcome
Products Containing Titanium Dioxide
See how Titanium Dioxide is used in these analyzed products:
Frequently Asked Questions
What does Titanium Dioxide do?
Industrial compound used in dental materials and coatings. Not a dietary supplement. Safety concerns exist.
What is the effective dose of Titanium Dioxide?
No established dose for oral supplementation
Is Titanium Dioxide safe?
Toxicology data from provided studies shows nano-TiO2 disrupts reproductive hormones and causes tissue damage in animal models
What doesn't Titanium Dioxide do?
Not a health supplement.
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-05-25