Harrie,
There are a few things to be aware of with Tumeric. You are right that Tumeric acts as a mild blood thinner so if you happen to take Coumadin you should speak with your physician. Here is a great resource complete with studies.
http://www.mskcc.org/cancer-care/herb/turmeric
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Turmeric
Healthcare ProfessionalConsumer
Scientific Name
Common Name
Clinical Summary
Food Sources
Purported Uses
Constituents
Mechanism of Action
Pharmacokinetics
Warnings
Contraindications
Adverse Reactions
Herb-Drug Interactions
Herb Lab Interactions
Literature Summary and Critique
References
Scientific Name
Curcuma longa, Curcuma domestica
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Common Name
Indian saffron, curcumin, jiang huang
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Clinical Summary
Turmeric is a plant that is native to South Asia but is cultivated in tropical areas around the world. The rhizome is used as a spice in regional cuisines, and as coloring agent in food and cosmetics for its yellow-orange color. It is also used in traditional medicine for circulation and digestion. The extract is marketed as a dietary supplement to improve memory, for arthritis, and for cancer prevention. The active constituents are turmerone oil and water-soluble curcuminoids, mainly curcumin which is the focus of most research. In vitro studies suggest that curcumin, the principal bioactive ingredient of turmeric, acts as a weak phytoestrogen (1), and exhibits neuroprotective (2), choleretic (3), anti-inflammatory (4), immunomodulatory (5), anti-proliferative (3), and chemopreventive effects (6) (7) (8). Curcumin, its analogs, and liposomal formulations have also produced chemosensitizing (9) (10) (11) and radiosensitizing effects (12) (13).