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Natural taro powder, also known as industrial Yuan Yi powder or fish maw powder, is made from taro corms using water or ethanol as extraction solvents. It typically appears as white to pale yellow powder with unique taro pigmentation and a slight alternating hue. The detection method used is thin-layer chromatography (TLC). This product should be stored in a cool, dry place, sealed to avoid high temperatures and drying out. The shelf life is two years.