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Question:
How does turmeric spice compare to turmeric (curcumin) in supplements? I sprinkle it on my foods and wonder if that's equivalent to taking a supplement.

Answer:
Turmeric spice is ground (dried) turmeric herb — specifically the root/rhizome, sold as a powder. Consuming between ½ to 1 teaspoon of turmeric powder (about 2.5 to 5 grams) with food has been found to have certain digestive and cognitive benefits
 
Most clinical studies, however, have not used turmeric powder, but turmeric extract. Only about 3% of the weight of turmeric powder is curcumin and "curcuminoid" compounds -- which are believed to be important to turmeric's effects. In turmeric extracts, the concentration of these is often increased to as high as 95%. 
 
Therefore, it is not unusual for a capsule containing half of a gram of turmeric extract to provide 400 mg of curcuminoids, while the same amount of turmeric powder (ground herb -- just like the spice) might provide only about 15 mg. In fact, in 2013, ConsumerLab.com found that capsules of turmeric "herb" (not extract) from a well-known supplement brand contained only 3 mg of curcuminoids per capsule. Many brands of turmeric supplements contain a combination of extract and herb, and the ratio will greatly affect the amount of curcuminoids you get, so be sure to check the amounts of curcuminoids in popular supplements in ConsumerLab.com's Review of Turmeric and Curcumin Supplements and Spices >>.
 
One advantage of using turmeric spice, as opposed to a supplement, is that you are more likely to consume it with fats or oils from your food. This will enhance absorption of curcuminoids in the turmeric, as they are lipophilic (they attach to fats). You should take turmeric supplements with meals for the same reason and/or choose a supplement which includes a bioavailability enhancer (as discussed in detail in the Review). 

Another way that turmeric extracts differ from turmeric powders is that extracts are less likely to be contaminated with heavy metals, such as lead, and do not contain the filth (insect parts and rodent hairs) normally found to varying degrees in the powders. In the Review, you'll also see our tests of levels of filth and heavy metals in popular turmeric spices for cooking, plus the dosage of herb or extract used in treating conditions such as ulcerative colitis, uveitis, arthritis, psoriasis, diabetes, depression, and cognitive function.

Also see CL Answers to the following questions: 

How does regular black pepper compare with black pepper extract used in supplements? Will sprinkling it on food with turmeric help increase the bioavailability of curcumin compounds from turmeric?  

I read that turmeric may be a GI irritant. I have GI problems and wonder if I should avoid turmeric and curcumin?  

I use a brand of curcumin and the most recent bottle contained capsules a few shades lighter than what I am accustomed to taking. Is this color change an issue to be concerned about?

Is it safe to take curcumin or turmeric supplements for a long period of time?

I've heard that curcumin is a MAO inhibitor. Is this true, and does that mean it is not safe to take if you eat amine-rich foods like cheese and dark chocolate?

I take ubiquinol to replenish CoQ10 depleted by my statin. I also take curcumin (from turmeric). Since they both manage free radicals, do I need to take the curcumin? 


See other recent and popular questions >>
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