Different COVID-19 vaccines change the proteins in breast milk in different ways. The Johnson & Johnson vaccine causes the most changes, while Moderna and Pfizer cause fewer.

Pro

Against

Evidence from Studies

Supporting (1)

Community contributions welcome

Associations between SARS-CoV-2 Infection or COVID-19 Vaccination and Human Milk Composition: A Multi-Omics Approach

Cross-Sectional Study

Human

Contradicting (0)

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No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Associations between SARS-CoV-2 Infection or COVID-19 Vaccination and Human Milk Composition: A Multi-Omics Approach

Score: 27

DOI: 10.1101/2024.04.12.589299

Similar Assertions

Getting a COVID-19 vaccine while breastfeeding doesn’t really change the makeup of your milk — no big shifts in fats, nutrients, or proteins — so it probably doesn’t affect your milk much at all.

77%

After getting the COVID vaccine, moms who are breastfeeding don’t pass any of the vaccine ingredients into their breast milk.

71%