The nanoparticles shown here have hydrophobic interiors that hold the curcumin and hydrophilic exteriors that make them more readily absorbed. Credit: The Anirban Maitra Lab

In recent years, laboratory and animal studies have suggested that curcumin--the pigment that gives the Indian curry spice turmeric its bright-yellow hue--could be useful for treating tumors, cystic fibrosis, and even Alzheimer's disease. But curcumin is insoluble and not readily absorbed by the body, making it impractical as a drug.

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