Natrol Red Yeast Rice With Garlic

Our assessment

The evidence shows that Natrol Red Yeast Rice With Garlic is a supplement where you need to be very careful. While the product label lists ingredients, the specific amounts of active compounds like monacolin K (the ingredient that works like a statin drug) are not provided in the data. Our assessment is that you should not take this product without first consulting your doctor, as the safety data is incomplete.

How it works

Red yeast rice contains monacolin K, which is chemically identical to the prescription drug lovastatin. It works by blocking an enzyme your liver uses to produce cholesterol. Garlic is often included for its potential to support heart health, though the data provided does not specify how these two ingredients interact in this specific product. The product also contains Calcium, which supports bone mineralization and neuromuscular relaxation [NIH ODS].

Safety profile

The FDA has received a total of 592,059 adverse event reports across all supplements, but specific report counts for this exact product are not available in the data. For the ingredient Calcium, safety risks include that high intakes might increase the risk of heart disease and prostate cancer. High blood and urine calcium levels can cause poor muscle tone, poor kidney function, constipation, nausea, weight loss, extreme tiredness, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS]. Data not available for side effects specific to red yeast rice or garlic from the provided FDA data.

Our recommendation

Our recommendation is to avoid using this product without medical supervision. Because red yeast rice can have the same effects and risks as prescription statins—including muscle pain and liver damage—you need a doctor to monitor you. Additionally, Calcium can reduce the absorption of medications like bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. Do not take this supplement if you take any of those medications. Talk to your doctor first.

Supplement labels contain several key sections regulated by the FDA:

• Serving Size — The recommended amount per dose. Always check this — some products require multiple capsules per serving.
• Amount Per Serving — Shows the quantity of each nutrient in the product, typically in IU (International Units), mg (milligrams), or mcg (micrograms).
• % Daily Value (%DV) — Indicates how much a nutrient in a serving contributes to a daily diet. 5% DV or less is low; 20% DV or more is high.
• Other Ingredients — Lists inactive ingredients like fillers, binders, and capsule materials (e.g., gelatin, cellulose, magnesium stearate).
• Suggested Use — The manufacturer's recommended directions for taking the supplement, including timing and dosage.

Source: FDA Dietary Supplement Labeling Guide