Talk:Carotene

message: Shoul this statement "It has been shown in trials that the ingestion of beta carotene at about 30 mg/day increases the rate of lung cancer and prostate cancer" be changed to "It has been shown in trials that the ingestion of beta carotene at about 30 mg/day DECREASES the rate of lung cancer and prostate cancer"  —Preceding unsigned comment added by 68.82.186.77 (talk) 12:45, 6 March 2008 (UTC)
replies: text: That section does need reworked.  See the next paragraph for the INCREASED risk of lung cancer in smokers. VMS Mosaic (talk) 15:48, 6 March 2008 (UTC)
thread_title: Cancer risk

message: I have changed the structures, as the old one was wrong. There should be 40 carbon atoms. In old structure (:Image:Alpha-carotene.png) there were only  38. Compare it with structure from commons.
Polimerek 23:20, 22 June 2006 (UTC)
thread_title:  Wrong structure 

message: Isn't beta carotene also called a "pro vitamin"? Can someone expand on "pro vitamins"? --68.103.154.140 16:49, 27 June 2006 (UTC)
thread_title:  Beta Carotene, a pro vitamin? 

message: I was wondering if we should include the SMILES notation for the compounds in the article somewhere.  It would be good to have them, but they tend to get pretty long in the long compounds.  If anyone is wondering:
α-carotene:
C\C2=C\CCC(C)(C)C2/C=CC(\C)=C\C=C\C(\C)=C\C=C\C=C(/C)\C=C\C=C(/C)\C=C\C1=C(/C)CCCC1(C)C
β-carotene:
CC2(C)CCCC(\C)=C2\C=C\C(\C)=C\C=C\C(\C)=C\C=C\C=C(/C)\C=C\C=C(/C)\C=C\C1=C(/C)CCCC1(C)C
I'm not sure if these are correct, I generated them from the 2 diagrams on the page.  If anyone wants the other notations, I can get them pretty easily.  Sbrools (talk . contribs) 17:19, 6 May 2007 (UTC)
thread_title:  [[SMILES]] Notation 

message: Can someone please add how many mg per kg you can find in the 
veggies and fruits in the "dietary source" list. THANKS -- Michael Janich 03:21, 28 October 2007 (UTC)
replies: text: Additionally, a certain concentration of carotene should be a criterion for inclusion in the list. I think it would be even better to use the amount of carotene per dry weight or per nutritional energy. Icek (talk) 12:05, 14 April 2008 (UTC)
thread_title:  Dietary source: how much per kg? 

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thread_title: [[WP:FOOD|WikiProject Food and drink]] Tagging

message: I was wondering why the 3D stick model is cis at C6-C7 and C8-C9 (and not in C6'-C7' and C8'-C9') while the strucutral formula further down is all trans.  If that is due to photo excitation it should be explained in the text.  2 September 2009 148.79.162.144 
Me too - but I had to find  for the carbon labeling. Rod57 (talk) 15:55, 7 December 2010 (UTC)
thread_title:  partially cis vs. all-trans 

message: The link should go to an archived version of the page unless it has simply been moved  — Preceding unsigned comment added by 173.48.186.28 (talk) 15:39, 13 June 2014 (UTC)
thread_title:  Link to Whole Foods broken, New source required 

message: Hello fellow Wikipedians,
I have just modified  on Carotene. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
*Added archive https://web.archive.org/web/20070626174921/http://www.whfoods.org:80/genpage.php?tname=nutrient&dbid=125 to http://www.whfoods.org/genpage.php?tname=nutrient&dbid=125
*Added archive https://web.archive.org/web/20080314060735/http://whfoods.org:80/genpage.php?tname=nutrient&dbid=116 to http://whfoods.org/genpage.php?tname=nutrient&dbid=116
*Corrected formatting/usage for http://www.cancer.org/docroot/NWS/content/NWS_1_1x_Warning_Labels_on_Beta_Carotene_Called_For.asp
*Added archive https://web.archive.org/web/20050330085659/http://www.berkeleywellness.com:80/html/ds/dsBetaCarotene.php to http://www.berkeleywellness.com/html/ds/dsBetaCarotene.php
*Added archive https://web.archive.org/web/20050306145547/http://www.umm.edu:80/altmed/ConsSupplements/BetaCarotenecs.html to http://www.umm.edu/altmed/ConsSupplements/BetaCarotenecs.html
When you have finished reviewing my changes, please set the checked parameter below to true or failed to let others know (documentation at ).
Cheers.—InternetArchiveBot (Report bug) 04:08, 16 November 2016 (UTC)
thread_title:  External links modified 

message: Is it true that beta-carotene is composed of two retinyl groups? It says nothing about that on the beta-carotene page. Can someone explain that to me, please.  Juliansteinb (talk) 17:50, 24 February 2019 (UTC)
thread_title:  Two retinyl groups 

message: When I was a youth I learned Carotene will help with night vision.  Is this right?  Jokem (talk) 03:10, 18 March 2024 (UTC)
thread_title:  Night Vision