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。482Please respect copyright.PENANAjKvM476XyK
482Please respect copyright.PENANAlfTp3Ou6Cg
482Please respect copyright.PENANASEi00PA23S
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。482Please respect copyright.PENANAoxev4HwCOL
482Please respect copyright.PENANAltoBBYpMcq
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?482Please respect copyright.PENANAKEGlCliGxS
482Please respect copyright.PENANA72jhSrKy7I
482Please respect copyright.PENANAMGFZgnjzyg
(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。482Please respect copyright.PENANA1pMkBxyeS6
482Please respect copyright.PENANA7Db2pPwT60
482Please respect copyright.PENANAZIcnl3T6BU
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。482Please respect copyright.PENANAOnfhJ0nII2
482Please respect copyright.PENANAu7mUPgMPGm
若然DHA無法進入腦部的話,亦沒能夠為大腦帶來正面影響。482Please respect copyright.PENANAzZKjaGzMC5
482Please respect copyright.PENANAEyoVucpYxL
(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。482Please respect copyright.PENANAIE01Kkox8K
482Please respect copyright.PENANAdtFxFiZgGR
482Please respect copyright.PENANADEUlrY3TCI
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。482Please respect copyright.PENANA6m3QG7XrC7
482Please respect copyright.PENANANciYZrzdaG
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。482Please respect copyright.PENANAvZlqJyy4R8
482Please respect copyright.PENANAJSesieFMUd
(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。482Please respect copyright.PENANAWr34579QdX
482Please respect copyright.PENANAZ4h76LVADL
482Please respect copyright.PENANA7HX3ogYhcH
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。482Please respect copyright.PENANAO2wAKc7pwn
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。482Please respect copyright.PENANAZY50hyZCCa
482Please respect copyright.PENANApVoqHSC25G
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。482Please respect copyright.PENANAROL4eWqSPZ
482Please respect copyright.PENANABtbUejE9rM
吃魚會使人變得更聰明,日後可能要改寫成為磷蝦了。482Please respect copyright.PENANAwLNdneZdrO
482Please respect copyright.PENANAMXurB1Jgjn
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。482Please respect copyright.PENANA0T0SbhptVQ
482Please respect copyright.PENANAdkTCYf6DPi
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/toc482Please respect copyright.PENANAyzBoDAoWst
482Please respect copyright.PENANAYM5mJqWUks
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。482Please respect copyright.PENANA7UsxgQhN9R
482Please respect copyright.PENANA7p2BZDtlh0
Link:482Please respect copyright.PENANAZDaBijIZQp
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio482Please respect copyright.PENANAg9ubULgGYJ
482Please respect copyright.PENANA1NyrNUzqQ3
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。482Please respect copyright.PENANAUBSpj9vIIG
482Please respect copyright.PENANAhSDXJs2oeT
Ref1:https://www.nature.com/articles/s41598-017-11766-0482Please respect copyright.PENANAdmZ4NJWWSE
Ref2:https://www.sciencedirect.com/science/article/pii/S0098299717301358#bib304482Please respect copyright.PENANAS6pppLtIUZ
Ref3:https://www.nature.com/articles/nature13241482Please respect copyright.PENANAPUirrKmgoX
Ref4:https://portlandpress.com/biochemj/article-abstract/345/1/61/34800/Characterization-of-plasma-unsaturated?redirectedFrom=fulltext482Please respect copyright.PENANAJarfKWX5Je
Ref5:https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1471-4159.1992.tb08353.x482Please respect copyright.PENANA2YAcjVYFQV
Ref6:https://journals.physiology.org/doi/abs/10.1152/ajpregu.1994.267.5.R1273?casa_token=1ZAjjbsr9IUAAAAA:GSyyUhEOi025bD-GJBWZFJqa8JrLt4HV9a9z3qqxJug7nP8x9bOoPUa1xJcixYkRJWXBWQ6ohZGHhw482Please respect copyright.PENANAWrRQYjI7r7
arrow_back
科普專欄–薯不揀單
more_vert
-
info_outline Info
-
toc Table of Contents
-
share Share
-
format_color_text Display Settings
-
exposure_plus_1 Recommend
-
Sponsor
-
report_problem Report
-
account_circle Login
Search stories, writers or societies
Continue ReadingClear All
What Others Are ReadingRefresh
X
Never miss what's happening on Penana!
科普專欄–薯不揀單
Author:
薯仔聞茱莉
ISSUE #73
深入淺出–食魚會使人變得更聰明?
LIKES 2
READS 478
BOOKMARKS 148
campaign
Request update 0
Sponsor
Login with Facebook
or Sign up/Login to comment or bookmark!
Click to load the next chapter
X
After each update request, the author will receive a notification!
smartphone100 → Request update
X
Sponsor again
Click to login
Login first to show your name as a sponsor.
Thank you for supporting the story! :)
Please Login first.
×
Write down what you like about the story
×
Reading Theme:
Font Size:
Line Spacing:
Paragraph Spacing:
Load the next issue automatically
Reset to default
×
People Who Like This