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Myth: Vaccine ingredients like formaldehyde and aluminum are toxic

✓ FACT

Vaccine ingredients are used in safe, studied amounts. Formaldehyde is present naturally in your body; aluminum amounts are far below toxic levels.

Vaccine Ingredients: Context Matters

### Formaldehyde in Vaccines

  • **Amount**: 0.02-0.04 mg per dose (inactivated vaccines only, not live vaccines)
  • **Your body**: Produces 40-50 mg/day naturally as a byproduct of metabolism
  • **Processed out**: Diluted to trace amounts during manufacturing
  • **Toxicity study**: Formaldehyde causes cancer at 15+ ppm in air; vaccine amounts are ng/mL

    • ### Aluminum in Vaccines

  • **Amount**: 0.125-0.5 mg per dose
  • **Your diet**: Unvaccinated children get 100-500 mg/day from food (breast milk, formula, vegetables)
  • **FDA limit**: 0.125 mg/kg/day IV — vaccines are far below this even for infants
  • **Function**: Adjuvant that helps immune system recognize vaccine

    • ### Thimerosal Myth Already Covered Above

    See "mercury-thimerosal-autism" — modern US vaccines don't contain it.

    ### Other Ingredients (Gelatin, Yeast, Antibiotics)

  • **Gelatin**: From animals; used to stabilize vaccine
  • **Yeast proteins**: From manufacturing process, trace amounts
  • **Antibiotics** (neomycin, gentamicin): Kill bacteria during manufacturing; removed before final product
  • **None exceed toxic levels**

    • ### Extreme Case: Are Some People Allergic?

    Yes, severe allergies to gelatin or specific proteins are rare (~1 in 1 million). These people get alternatives or different vaccines. This is why we ask about allergies pre-vaccination.

    📚 Research Sources

    Mitkus RJ, King DB, Hess MA, Forshee RA, Walderhaug M (2011)

    "Updated aluminum pharmacokinetics following infant exposures"

    Vaccine

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    Vaccine ingredients are used in safe, studied amounts. Formaldehyde is present naturally in your body; aluminum amounts are far below toxic levels.

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