葡萄醣（粵拼：pou4 tou4 tong4，英文：glucose），又寫葡萄糖，單醣一種，係六碳醣，化學式 。葡萄糖係響植物入邊發現，佢同菓醣、半乳醣夾埋成咗三種囉嚟食嘅，兼且消化嗰陣直接吸收入血管嘅單糖。葡萄糖喺生物當中好重要，係能量嘅主要來源同埋新陳代謝嘅中間產物。葡萄糖係光合作用嘅產物，亦係細胞呼吸嘅燃料。
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