How To Check A Supplement's Cited Studies
A supplement review citing a "Harvard trial" or "published journal study" sounds authoritative — but the citation is only as good as the actual link behind it.
Here's how to check for yourself, using something we found while researching PrimeBiome as a real example.
Why this check matters
Anyone can write "Harvard Medical School Trial (2023) found a 39% reduction in inflammatory markers." Whether that sentence is trustworthy depends entirely on whether the linked source actually says that. Readers rarely click through, which is exactly why the practice persists.
What we found with PrimeBiome specifically
A published review of PrimeBiome cited a "Harvard Medical School Trial (2023)" with specific statistics on inflammation and hydration. Following that exact link led to a general Harvard news article about a researcher receiving an award — not a study, and not containing those statistics. A second citation, an "International Journal of Dermatology (2024)" study on Babchi's bacterial inhibition rate, linked instead to an unrelated paper about antibiotic resistance in acne bacteria.
How to check a citation yourself
- Click through every linked citation, not just the ones that look official.
- Check that the study's actual subject matches what's being claimed (the right ingredient, the right outcome, the right population).
- Look for the specific number you were told to expect — if you can't find it in the linked source, don't treat it as confirmed.
Applying this to PrimeBiome
We could not verify the specific statistics tied to these two "landmark studies," so we have not repeated them as fact anywhere on this site. See our full reviews page for the complete transparency note.
