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。493Please respect copyright.PENANAw7u49GQMo6
493Please respect copyright.PENANAZrUu4pI8PZ
493Please respect copyright.PENANAbD2rptK9MP
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。493Please respect copyright.PENANAkIlnQVG9II
493Please respect copyright.PENANA7qLEfHMqCJ
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?493Please respect copyright.PENANAk1wZj3AgbY
493Please respect copyright.PENANANQyAII4ifd
493Please respect copyright.PENANAZDGNKlF4C2
(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。493Please respect copyright.PENANAbGG3RsaQAG
493Please respect copyright.PENANAktRAfDwOfW
493Please respect copyright.PENANAnfOPrzE2XL
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。493Please respect copyright.PENANALI0S9bfh9I
493Please respect copyright.PENANAclMj74OmrE
若然DHA無法進入腦部的話,亦沒能夠為大腦帶來正面影響。493Please respect copyright.PENANAszJABLalGs
493Please respect copyright.PENANA5MUB5QDNoU
(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。493Please respect copyright.PENANAyEumgR3LJK
493Please respect copyright.PENANA06RMzXCG8x
493Please respect copyright.PENANAYa7402nupa
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。493Please respect copyright.PENANAHiq58VSmPw
493Please respect copyright.PENANALYfOruQfcz
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。493Please respect copyright.PENANAZRKrmpC363
493Please respect copyright.PENANA2gtJMEpShg
(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。493Please respect copyright.PENANA4bfFnnrzAf
493Please respect copyright.PENANA9E7eCXZTXO
493Please respect copyright.PENANAmNIHqjCSGa
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。493Please respect copyright.PENANA5KODAUpe97
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。493Please respect copyright.PENANAZtstSNp1Oq
493Please respect copyright.PENANAcPW2CC4DVQ
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。493Please respect copyright.PENANAb1NAaav2C0
493Please respect copyright.PENANAh7CiJSp6BR
吃魚會使人變得更聰明,日後可能要改寫成為磷蝦了。493Please respect copyright.PENANAFDtwcIJaXC
493Please respect copyright.PENANASoJemsd1J9
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。493Please respect copyright.PENANASlUZBhzBZn
493Please respect copyright.PENANArXbHX47onF
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/toc493Please respect copyright.PENANAFIiRK7Jkp0
493Please respect copyright.PENANA1XRSjoh8tf
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。493Please respect copyright.PENANAUP0u6S9pRs
493Please respect copyright.PENANAkOlLoB79Xr
Link:493Please respect copyright.PENANA6BcG0atNDI
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio493Please respect copyright.PENANAHV272tytvU
493Please respect copyright.PENANAnxCeaVqRlY
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。493Please respect copyright.PENANAR5dfxBQnby
493Please respect copyright.PENANAOK9zpekWeZ
Ref1:https://www.nature.com/articles/s41598-017-11766-0493Please respect copyright.PENANApgAA1VUmBA
Ref2:https://www.sciencedirect.com/science/article/pii/S0098299717301358#bib304493Please respect copyright.PENANAplMiC9AF4p
Ref3:https://www.nature.com/articles/nature13241493Please respect copyright.PENANAYtCvjsFMAB
Ref4:https://portlandpress.com/biochemj/article-abstract/345/1/61/34800/Characterization-of-plasma-unsaturated?redirectedFrom=fulltext493Please respect copyright.PENANA97PQoBmJL9
Ref5:https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1471-4159.1992.tb08353.x493Please respect copyright.PENANAosyZFau9Km
Ref6:https://journals.physiology.org/doi/abs/10.1152/ajpregu.1994.267.5.R1273?casa_token=1ZAjjbsr9IUAAAAA:GSyyUhEOi025bD-GJBWZFJqa8JrLt4HV9a9z3qqxJug7nP8x9bOoPUa1xJcixYkRJWXBWQ6ohZGHhw493Please respect copyright.PENANAsw7dX3xCpz
arrow_back
科普專欄–薯不揀單
more_vert
-
info_outline 資料
-
toc 目錄
-
share 分享
-
format_color_text 介面設置
-
exposure_plus_1 推薦
-
打賞
-
report_problem 檢舉
-
account_circle 登入
X
科普專欄–薯不揀單
作者:
薯仔聞茱莉
篇 #73
深入淺出–食魚會使人變得更聰明?
喜歡 2
閱讀 489
書籤 148
campaign
催更 0
打賞
以 Facebook 帳號登入
或 註册/登入 以留言或加上書籤
按此加載下一章
X
每次催更後,作者都會收到通知!
smartphone100 → 催更
×
寫下你喜歡這個故事的地方
×
對此喜歡的人