(NewsNation) — A new study out of Denmark challenges claims that aluminum in childhood vaccines poses health risks.

A comprehensive analysis was conducted on the health records of over 1.2 million children spanning a 24-year timeframe. This study, which was released on Monday in the Annals of Internal Medicine, showed no evidence to support a link between aluminum in vaccines and any rise in chronic conditions like asthma, autism, or autoimmune diseases.

Aluminum salts are commonly used in vaccines as adjuvants to enhance immune response, according to the Children’s Hospital of Philadelphia.

Despite ongoing concerns from critics regarding the possible health risks of aluminum, the research revealed no connection between vaccine-related aluminum exposure and any of the 50 chronic conditions studied. These conditions included 36 autoimmune disorders, nine allergy or asthma-related conditions, and five neurodevelopmental disorders.

The study utilized Denmark’s nationwide registry to monitor the vaccine history and medical records of children born from 1997 to 2018, continuing their follow-up until the end of 2020. Researchers evaluated aluminum exposure by the age of 2 and compared health outcomes across different levels of exposure. It is important to note that unvaccinated children were not part of this study.

Only 1.2% of children received no “aluminum-adsorbed vaccines” before age 2. The rest received varying doses, with total aluminum exposure ranging from 0.125 mg to 1.00 mg per dose. The median exposure across the cohort was approximately 3 mg.

Researchers acknowledge they can’t completely rule out the possibility of a small increased risk for rare disorders.