Natrol Extra Strength Turmeric

Our assessment

The evidence shows that while the product you asked about is called "Extra Strength Turmeric," the only ingredient data we have is for calcium. Our assessment is that this product is not what the label suggests based on the available data. We cannot evaluate turmeric benefits or risks because the data provided contains no information on turmeric. For the calcium component, the data shows it supports bone health, but we must be transparent that the primary ingredient (turmeric) is missing from the data set [NIH ODS].

How it works

For the calcium in this product, think of it as a structural builder — it supports bone mineralization and density, and also helps with neuromuscular relaxation and nerve signaling. This means it helps your bones stay strong and your muscles relax properly after contracting [NIH ODS].

Safety profile

The FDA received a total of 592,059 adverse event reports across all supplements, but no specific report count is available for this product alone. For the calcium component, high intakes might increase the risk of heart disease and prostate cancer. High levels in the blood and urine can cause poor muscle tone, poor kidney function, low phosphate levels, constipation, nausea, weight loss, extreme tiredness, frequent need to urinate, abnormal heart rhythms, and a high risk of death from heart disease [FDA data] [NIH ODS]. Calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

Data not available for turmeric content or dosage. For the calcium component, we cannot recommend this product as a turmeric supplement because the data provided does not confirm it contains any turmeric. If you seek a turmeric supplement, look for one with a standardized curcumin content and a bioavailability enhancer like black pepper extract. For calcium, if that is your goal, ensure you are not exceeding 1,000–1,200 mg total daily from all sources, and take it with food [NIH ODS].

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