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Vaccine Ingredients

Each component in each vaccine serves a purpose. Certain ingredients help keep vaccines safe from contamination and toxins, while others, like stabilizers, help vaccines stay effective for a long time. Each of the components are added intentionally to perform an important function. If any trace compounds are found in a vaccine, it is at a lower level than found naturally in the body or the environment --because all vaccine ingredients help to make a vaccine as effective as possible, while still remaining safe.88

Take a look for yourself- click on each category type of ingredients to learn more.



      • Purpose: To keep the vaccine effective after manufacturing
      • Most Commonly Found: in Jell-O and naturally in the body
      • Examples: sugars and gelatin

      • Purpose: To help boost the body’s response to the vaccine
      • Most Commonly Found: in drinking water, infant formula, and health products such as antacids/buffered aspirin/antiperspirants
      • Example: aluminum salts

      • Purpose: To kill viruses or inactive toxins during the manufacturing process 
      • Most Commonly Found: naturally in the human body, fruits, and household furnishings (carpets/upholstering)
      • Example: formaldehyde

      • Purpose: To grow enough of the virus or bacteria to make the vaccine
      • Most Commonly Found: in eggs and foods that contain eggs
      • Example: egg protein

      • Purpose: To prevent contamination by bacterial during the manufacturing process
      • Most Commonly Found: in antibiotics
      • Examples: neomycin, kanamycin, streptomycin

      • Purpose: To prevent contamination (in multi-dose vials)
      • Most Commonly Found: in some kinds of fish
      • Example: thimerosal


    *For more information around preservatives in vaccines please visit, CDC- Thimerosal and     Vaccines89

Ingredients in Specific Vaccines

The Food and Drug Administration (FDA), which is responsible for making sure vaccines are safe and effective, has information about all approved vaccines.

Check out the links below to discover the different vaccine options and the various ingredients.

  • FDA-approved vaccines
    • Learn about the vaccines that are currently approved in the U.S. by the FDA to prevent different diseases- See approved vaccines.90