食魚會使人變得更聰明,這句說話很大程度上可能是建基於不少魚類含有大量OMEGA3脂肪酸。610Please respect copyright.PENANAp1F0LIa7BX610Please respect copyright.PENANA25mn1sZlAi
610Please respect copyright.PENANArVix5TocLK
DHA是OMEGA3脂肪酸的一種,有實驗證據(Ref1)顯示有助老鼠大腦發展,故此被推算能預防人類腦退化症的發生,又或者輾轉被認定可以使人變得更加聰明。610Please respect copyright.PENANAROUDSt72ZM
610Please respect copyright.PENANAOB3D2vw8Yr
無論如何,媒體廣告經常渲染DHA對人體非常有益,尤其是標榜魚肝油產品含有好多DHA,非常值得進食,這究竟可不可信呢?610Please respect copyright.PENANA1a9P0ctTI2
610Please respect copyright.PENANA0tAPot52oa
610Please respect copyright.PENANARCLrilQOmw
(圖2)基於個別某幾種蛋白酶數量不足的關係,我們的腦部只能產生極為微量的DHA,而肝臟亦只能夠產生相對少量DHA,因此DHA的獲取來源主要均依靠飲食得來。610Please respect copyright.PENANAPemOHljxWN610Please respect copyright.PENANAx3TXHqwbWG
610Please respect copyright.PENANApEUekmFZMB
但有研究發現(Ref1,2),餵飼老鼠DHA的話,血液、心臟及肝臟DHA含量雖然的確有所提高,但腦部的DHA水平則無任何大變化。610Please respect copyright.PENANAILCXsVgk3j
610Please respect copyright.PENANAUZ7KQPZ5pV
若然DHA無法進入腦部的話,亦沒能夠為大腦帶來正面影響。610Please respect copyright.PENANAZQKrKvI9r8
610Please respect copyright.PENANAgKGOVWD0LE
(圖3)經過一系列的研究後,科學家發現Mfsd2a是腦部負責從血管接收DHA的蛋白質(Ref3,4),它傾向接收與磷脂LPC結合的DHA,而不太傾向接納其他狀態的DHA。610Please respect copyright.PENANADIMj4QtXFL610Please respect copyright.PENANAb8SzC0bdWz
610Please respect copyright.PENANAfxG8nVkfdh
這亦解釋得到,為何單獨餵飼老鼠DHA並不會引起腦部的DHA水平提升,原因是它並不是處於與LPC連結的狀態。610Please respect copyright.PENANABIGAHhwbnt
610Please respect copyright.PENANALl0Ky8Lf3b
然而,這個機制僅是腦部獨有,因此心臟、肝臟以及脂肪組織均能輕易有效攝取DHA,以及與磷脂LPC結合的DHA。610Please respect copyright.PENANAMaBu0G2ZFy
610Please respect copyright.PENANAQbsTodJZ29
(圖4)有研究(Ref5,6)指出,DHA與磷脂LPC的sn-2位置結合的話,DHA進入腦部的效果會更好。但亦有研究(Ref1)指sn-1或者sn-2均無任何大影響。610Please respect copyright.PENANAPD2zTdy342610Please respect copyright.PENANAn2cDLPdEY2
610Please respect copyright.PENANAwZO5PAmjfF
這些在老鼠大腦進行的研究,能否百分百套用在人類身上還是未知之數。610Please respect copyright.PENANAjIGf5qmZXy
但若然初心是想讓大腦攝取DHA的話,選購健康產品的時候還是留意一下究竟相應的DHA究竟是處於甚麼狀態為好。610Please respect copyright.PENANAsDE0AOobyt
610Please respect copyright.PENANAHqShHDYERe
至於日常飲食的話,磷蝦油(Krill Oil)則對比魚油相對上含有較多與磷脂結合的DHA。610Please respect copyright.PENANAW76RVdAbt1
610Please respect copyright.PENANAmib13Vm0sj
吃魚會使人變得更聰明,日後可能要改寫成為磷蝦了。610Please respect copyright.PENANAc20jN6mcXv
610Please respect copyright.PENANAoBmaZ0ZQOy
如果想我快啲出文的話,請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark,這對我非常之重要。610Please respect copyright.PENANAZZBNWCesL0
610Please respect copyright.PENANAQqDaLWpVJF
Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc610Please respect copyright.PENANAom437pgG1d
610Please respect copyright.PENANAh5minpc41O
同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」,以課金的方式推動我繼續搜羅資料寫文,多謝。610Please respect copyright.PENANA2UzotHa1U5
610Please respect copyright.PENANAEXOzpenniA
Link:610Please respect copyright.PENANA1s5YwER8Mx
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio610Please respect copyright.PENANAH7PXiDffNt
610Please respect copyright.PENANAWL1zZ4WQok
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。610Please respect copyright.PENANAg6cl5UdfCR
610Please respect copyright.PENANA5CRL6hyjmJ
Ref1:https://www.nature.com/articles/s41598-017-11766-0610Please respect copyright.PENANAJwwfDXtcim
Ref2:https://www.sciencedirect.com/science/article/pii/S0098299717301358#bib304610Please respect copyright.PENANAr5iFbMROjj
Ref3:https://www.nature.com/articles/nature13241610Please respect copyright.PENANAFjYnbmlOGJ
Ref4:https://portlandpress.com/biochemj/article-abstract/345/1/61/34800/Characterization-of-plasma-unsaturated?redirectedFrom=fulltext610Please respect copyright.PENANAUTtWqWGWvg
Ref5:https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1471-4159.1992.tb08353.x610Please respect copyright.PENANAKtqZPPkjyE
Ref6:https://journals.physiology.org/doi/abs/10.1152/ajpregu.1994.267.5.R1273?casa_token=1ZAjjbsr9IUAAAAA:GSyyUhEOi025bD-GJBWZFJqa8JrLt4HV9a9z3qqxJug7nP8x9bOoPUa1xJcixYkRJWXBWQ6ohZGHhw610Please respect copyright.PENANAr3EBujXehZ