Even though the FDA says these supplements should be the same every time, the red yeast rice pills you buy at stores like Walmart or CVS can have wildly different amounts of the active ingredient—so sometimes they might work, sometimes they might not.

21

Pro

0

Against

Evidence from Studies

Supporting (1)

21

Community contributions welcome

21

Variability in strength of red yeast rice supplements purchased from mainstream retailers

Cross-Sectional Study

2017 Sep

Scientists tested red yeast rice supplements from stores like Walmart and found that the active ingredient varied wildly — some had almost none, others had a lot — even though the FDA says they should be consistent. So yes, the supplements are unpredictable.

Contradicting (0)

0

Community contributions welcome

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

Variability in strength of red yeast rice supplements purchased from mainstream retailers

Score: 21

DOI: 10.1177/2047487317715714

Similar Assertions

Some red yeast rice supplements sold in U.S. stores don’t have any of the active ingredient (monacolin K) that’s supposed to help lower cholesterol, while others have wildly different amounts—from almost nothing to a lot—so you never know what you’re really getting.

21

0

73%