NOW Curcumin From Turmeric Root Extract

Our assessment

The evidence shows that while curcumin from turmeric root extract is a popular supplement, the data on its specific benefits and risks is limited compared to more thoroughly studied nutrients like calcium. For the ingredient calcium, which is present in many formulations, the data is robust but carries specific cautions. Our assessment is that you should approach this product with a clear understanding of what the data does and does not support.

How it works

Think of calcium as a structural and signaling powerhouse. It supports bone mineralization and density, and it is essential for neuromuscular relaxation and nerve signaling [NIH ODS]. For curcumin specifically, data on its mechanism of action is not available in the provided information.

Safety profile

Safety data for curcumin is not available in the provided information. For calcium, the data shows clear risks: 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 [NIH ODS]. The FDA has received 592,059 total adverse event reports across all products, though specific report counts for this exact product are not available [FDA data].

Our recommendation

Start by checking if you actually need a curcumin or calcium supplement. For calcium, do not exceed the RDA without a doctor's guidance, as high intakes carry serious risks [NIH ODS]. Be aware that calcium can reduce the absorption of medications like bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. For curcumin, data is not available to make a specific dosing recommendation. Always consult your healthcare provider before starting this supplement.

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