Why your supplement might not work like it should
Variability in strength of red yeast rice supplements purchased from mainstream retailers
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Monacolin K was undetectable in two brands despite being marketed as cholesterol-lowering supplements.
Consumers assume these products contain the active ingredient they claim—especially since they’re sold alongside pharmaceuticals in pharmacies and big retailers. Finding zero active ingredient in some bottles contradicts the expectation of basic product integrity.
Practical Takeaways
If you're taking red yeast rice for cholesterol, ask your doctor for a blood test to check if it's actually working—or switch to a prescribed statin.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Monacolin K was undetectable in two brands despite being marketed as cholesterol-lowering supplements.
Consumers assume these products contain the active ingredient they claim—especially since they’re sold alongside pharmaceuticals in pharmacies and big retailers. Finding zero active ingredient in some bottles contradicts the expectation of basic product integrity.
Practical Takeaways
If you're taking red yeast rice for cholesterol, ask your doctor for a blood test to check if it's actually working—or switch to a prescribed statin.
Publication
Journal
European Journal of Preventive Cardiology
Year
2017
Authors
Pieter A. Cohen, B. Avula, I. Khan
Related Content
Claims (3)
Unlike pills you need a doctor’s prescription for, vitamins and supplements you buy over the counter aren’t tightly checked, so what’s in them can vary a lot — sometimes they have too little of the good stuff, or even bad stuff mixed in.
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.
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.