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中國五大頂級名膠包括金錢、房膠、蜘蛛、白花、赤嘴。除這五種外，其他花膠都是普通的。花膠的功效、價格、大小和厚度之間沒有必然的關聯，有些名貴的花膠很小很薄，例如白花膠和蜘蛛膠。相反地，有些花膠很大很厚卻功效一般，例如鲶魚膠。中醫百科 上
好的花膠外形大且厚，緊密均勻，顏色淡黃、清潔、有光澤，半透明，沒有血筋、沒有黏質物，年份越久越值得珍藏。揀選花膠時應看花膠是否完整、波紋是否清晰、有沒有變黑或花心。優質花膠皮薄肉厚，沒有油脂或雜質，外觀和顏色為白色或淡黃色。好的花膠
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