Traditional and Clinically Used Dosages of Turmeric and Acceptable Daily Intake
Whether used as a spice or medicine, turmeric provides health benefits. In the diet, turmeric is a great herbal choice to spice up soups, stews, and curries. Heating turmeric actually increases its antioxidant activity, unlike other similar spices (such as ginger). (i.11)
Traditional dosages of turmeric root depend on the ailment. For example:
- Arthritis : 8-60 grams fresh turmeric three times a day. (i.5)
- Stomach ache: 1.3-3 grams. (i.5)
- Mild colds and flu: 1 teaspoon of turmeric tincture combined with ½ teaspoon of ginger, honey, and water 2-3 times a day, but to relieve dry coughing such as in bronchitis, Ayurveda practitioners recommend a large teaspoon of turmeric tincture mixed with warm milk and honey. (i.56)
- Sore throat: gargle 3 times a day turmeric tincture (mixed with salt water and licorice tincture). (i.56)
In Ayurveda, turmeric is taken both internally and externally to treat skin rashes (e.g., eczema and scabies) and acne. Externally, practitioners mix it with water, honey, or ghee and apply it as a paste to the affected area. Be warned that it will likely temporarily stain your skin an orange-yellow color, however. Using the same paste and covering it with a plastic wrap that is changed every few hours is recommended for bruises and sprains. (i.56)
Dosages Used in Clinical Trials
|Bladder cancer||0.5-12 g/day for 3 months|
|Cancer prevention||1.5 g/day for 30 days|
|Cancer treatment (oral, breast, vulva, skin, and other sites)||Topical, dosage unknown|
|Cervical dysplasia||0.5-12 g/day for 3 months|
|Intestinal metaplasia of the stomach||0.5-12 g/day for 3 months|
|Irritable bowel syndrome||144 mg/day for 8 weeks|
|Multiple myeloma||2-12 g/day for 3-12 months|
|Oral leukoplakia||0.5-12 g/day for 3 months|
|Pancreatic cancer||8 g/day; up to 18 months|
|Safety study in healthy volunteers||0.6-1.0 mL 3 times daily for 3 months|
|Stomach ulcer||1500 mg/day for 4-12 weeks|
Acceptable Daily Intake
Many scientists have conducted safety studies on turmeric and curcumin, the primary compound in the herb. These studies have been reviewed at least a dozen times by the Joint FAO/WHO Expert Committee on Food Additives (JECFA) since 1974. They include the toxicology report prepared by the Unites States National Toxicology Program. (i.4, 59-60)
There were insufficient data to establish an Acceptable Daily Intake (ADI) for curcumin in 1975. But by 2004 enough research had been conducted to do so. The JECFA set an ADI of 0-3 mg/kg of body weight (bw) per day at that time. (i.59)
Subsequent and cumulative research led the JECFA to declare in 2010 that curcumin is not carcinogenic or genotoxic. This conclusion was reached with agreement from the European Food Safety Authority expert Scientific Committee and Scientific Panel. Based on this conclusion, JECFA raised and set the current ADI for curcumin to 3 mg/kg bw/day. (i.59)
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