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Back美研究:番茄天然成分「植物烯」有助減少小鼠脂肪肝
美研究:番茄天然成分「植物烯」有助減少小鼠脂肪肝
Health
自由时报17 hours agoHealth2 min readChina

美研究:番茄天然成分「植物烯」有助減少小鼠脂肪肝

美國最新研究發現番茄中的「植物烯」可在小鼠實驗中減少肝臟脂肪堆積,但目前尚無人體臨床證據。

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美國塔夫茲大學最新研究發現,番茄等食物中含有的天然成分「植物烯」(phytoene)在小鼠實驗中能減少長期攝取高精製碳水化合物飲食所造成的肝臟脂肪堆積,但人體效果仍待進一步研究證實。

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Why It Matters

番茄含有茄紅素及其他類胡蘿蔔素前驅物,科學家持續探索其對健康的潛在益處。

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研究發現,番茄中的天然成分「植物烯」(phytoene)有助減少脂肪肝;圖為情境照。(圖取自freepik)

番茄不只含有大家熟悉的茄紅素,美國最新研究發現,其中一種名為「植物烯」(phytoene)的成分,在小鼠實驗中可減少肝臟脂肪堆積。研究團隊認為,這種成分可能透過體內代謝產生作用,但目前還沒有人體證據證明吃番茄能達到相同效果。

據《ScienceDaily》報導,美國塔夫茲大學(Tufts University)研究團隊發現,補充植物烯的小鼠,在長期攝取高精製碳水化合物飲食後,肝臟脂肪堆積較少。研究人員認為,植物烯可能透過體內代謝轉化後,產生有助脂肪處理的作用。

研究人員讓小鼠持續24週攝取高精製碳水化合物飲食,再補充15-順式植物烯(15-cis-phytoene)。結果發現,補充植物烯的小鼠出現的脂肪肝程度較輕,肝臟脂肪代謝相關活動也有所增加。

植物烯是番茄製造茄紅素等類胡蘿蔔素時的前驅物,本身沒有明顯顏色,因此不像茄紅素那樣容易被注意。這種成分也可在紅蘿蔔、紅甜椒、西瓜及其他食物中找到。

植物烯可能要先經代謝 真正作用另有關鍵

研究進一步發現,植物烯可能不是直接發揮效果,而是先在體內經過代謝,再產生真正具有作用的物質。當小鼠缺少參與類胡蘿蔔素代謝的相關酵素時,即使體內累積更多植物烯,也沒有出現同樣的脂肪肝保護效果。

這表示研究看到的可能不是植物烯本身直接「燃脂」,而是它進入體內後產生的代謝作用。

不過,這項研究目前仍停留在動物實驗,不能直接解讀成吃番茄就能預防或改善脂肪肝。研究團隊也指出,植物烯在人體內如何被吸收、代謝,以及是否真的能帶來相同效果,仍需要進一步研究。

這項研究由塔夫茲大學團隊進行,成果刊登於《分子營養與食品研究》(Molecular Nutrition & Food Research)期刊。

Open Questions

  • 植物烯在人體內的吸收與代謝機制為何?
  • 食用番茄是否能達到與小鼠實驗相同的改善脂肪肝效果?

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