Yam Authenticity:
Genuine Yam: The surface is typically yellowish white or light yellow, with visible longitudinal grooves and wrinkles. It often has fibrous root marks, and occasionally, a thin layer of light brown skin remains. The yam feels firm to the touch, not easily broken, and when cut, the cross-section is white and powdery with small dark dots scattered throughout. It has a mild aroma and a slightly sour taste, with a sticky texture when chewed.
Counterfeit Products:
Cassava: Often sliced into thin pieces, with the outer skin usually removed. Any remaining skin appears brown or tan. The cut surface is white and powdery, with noticeable veins near the outer layer. A small wooden core may be present in the center, and some pieces may show cracks. When touched, it feels gritty and powdery. It has a very mild scent and a bland, slightly sweet taste.
Ginseng: This root is irregularly shaped, either cylindrical or conical. The corky outer layer is thicker, appearing yellowish-brown or reddish-brown. The inner wood is bright yellow (due to stone cells) and can be easily peeled off. The texture is solid, with a cross-section that is pale yellowish-white and powdery, sometimes showing a few light brown spots. It has no strong odor, a sweet and slightly sour taste, and a chewy consistency.
Sweet Potato: Typically found in thick or irregular slices, with a thicker layer of skin that may appear reddish or taupe. The cut surface is white or pale yellow, slightly elastic, and shows yellowish-brown "ribs" or lines. A light yellow-brown ring may be visible near the skin. It is crisp, powdery, and sweet in flavor.
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