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年菜反覆加熱藏危機 臺北醫院營養師示警恐引發食物中毒

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2026/02/24 | 2分鐘閱讀

(記者陳志仁/新北報導)春節聚餐頻繁,年菜一桌接一桌,剩菜成為家家戶戶日常;衛生福利部臺北醫院營養科主任李佩霓提醒,年節最易忽略的食安風險就是「反覆加熱」,恐增加腸胃不適與食物中毒機率。

圖/李佩霓營養師警告,「反覆加熱」是過年腸胃炎地雷。(臺北醫院提供)圖/李佩霓營養師警告,「反覆加熱」是過年腸胃炎地雷。(臺北醫院提供)

李佩霓表示,許多家庭為避免浪費,常將整鍋年菜反覆加熱、再放回冰箱保存,然而這樣的習慣正是常見的食安地雷;食物在加熱與冷卻的反覆過程中,容易落入細菌快速繁殖的危險溫度帶,即使外觀看似正常、氣味無異,也可能已經產生肉眼無法察覺的微生物風險,一旦食用便可能引發腹瀉、嘔吐或腸胃炎等症狀。

李佩霓建議,若預期菜餚吃不完,應在正式用餐前就先將隔日預計食用的份量分裝冷藏,避免整鍋反覆加熱;分裝時應使用乾淨、密封性良好的容器,並減少與生食材接觸,以降低交叉污染機率,同時也能讓後續加熱更均勻、安全。

在保存原則方面,李佩霓提醒,剩菜應在料理完成後2小時內放入冰箱冷藏,不必等到完全放涼,只要不再持續冒熱氣即可入庫,以避開細菌迅速繁殖的「危險溫層」;冷藏期間建議於3天內食用完畢,避免因存放過久導致品質變質與食安風險升高。

李佩霓指出,春節常見的火鍋湯底、燉煮類或滷味年菜,看似持續加熱就很安全,但若反覆加入生食材、或長時間置於室溫下,仍可能成為細菌滋生的溫床;即使是湯品,也不建議整鍋連續多日反覆加熱食用,以免累積風險。

李佩霓說,再次食用剩菜前,務必徹底加熱,確保食物中心溫度達攝氏75度以上,以降低食物中毒機率;若發現食物出現異味、變色、發黏或口感異常,即使再捨不得也應立即丟棄,避免因小失大。

李佩霓強調,年節飲食重點在於「吃得安心」而非勉強清空餐桌,妥善處理剩菜不僅能守住食安底線,也能兼顧環保與健康,才能真正安心過好年。

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