Editing Vitamin C (section)

==Food preservation additive==
Ascorbic acid and some of its [[salt (chemistry)|salts]] and [[ester]]s are common [[food additive|additives]] added to foods such as [[canning|canned]] fruits, mostly to slow [[redox|oxidation]] and [[Food browning|enzymatic browning]].<ref name="Washburn-2017">{{cite web|url=https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=2781&context=extension_curall|title=Pretreatments to prevent darkening of fruits prior to canning or dehydrating|vauthors=Washburn C, Jensen C|date=2017|publisher=Utah State University|access-date=January 26, 2020|archive-date=December 15, 2020|archive-url=https://web.archive.org/web/20201215135857/https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=2781&context=extension_curall|url-status=live}}</ref><ref name="pmid35052657">{{cite journal |vauthors=Yin X, Chen K, Cheng H, Chen X, Feng S, Song Y, Liang L |title=Chemical Stability of Ascorbic Acid Integrated into Commercial Products: A Review on Bioactivity and Delivery Technology |journal=Antioxidants |volume=11 |issue=1 |date=January 2022 |page=153 |pmid=35052657 |pmc=8773188 |doi=10.3390/antiox11010153|doi-access=free }}</ref> It may be used as a [[flour treatment agent]] used in [[breadmaking]].<ref name="fobvc">{{cite news |title=Ingredients |url=https://www.fob.uk.com/about-the-bread-industry/how-bread-is-made/ingredients/ |access-date=April 3, 2021 |publisher=The Federation of Bakers |archive-date=February 26, 2021 |archive-url=https://web.archive.org/web/20210226064815/https://www.fob.uk.com/about-the-bread-industry/how-bread-is-made/ingredients/ |url-status=live }}</ref> As food additives, they are assigned [[E number]]s, with safety assessment and approval the responsibility of the [[European Food Safety Authority]].<ref name="Food Additives and Ingredients Association UK & Ireland- Making life taste better">{{cite web|url=http://www.faia.org.uk/faq2_4.php|title=Frequently asked questions {{!}} why food additives|website=Food Additives and Ingredients Association UK & Ireland- Making life taste better|access-date=October 27, 2010|url-status=live |archive-url=https://web.archive.org/web/20190601015633/https://www.faia.org.uk/faqs/|archive-date=June 1, 2019}}</ref> The relevant E numbers are:
# E300 ascorbic acid (approved for use as a food additive in the UK,<ref name="food.gov.uk">UK Food Standards Agency: {{cite web |url=http://www.food.gov.uk/safereating/chemsafe/additivesbranch/enumberlist |title=Approved additives and their E numbers |access-date=October 27, 2011 |archive-date=October 7, 2010 |archive-url=https://web.archive.org/web/20101007124435/http://www.food.gov.uk/safereating/chemsafe/additivesbranch/enumberlist |url-status=live }}</ref> US<ref name="fda.gov">US Food and Drug Administration:{{cite web|url=https://www.fda.gov/Food/FoodIngredientsPackaging/FoodAdditives/FoodAdditiveListings/ucm091048.htm |title=Listing of food additives status part I |website=Food and Drug Administration |access-date=October 27, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20120117060614/https://www.fda.gov/Food/FoodIngredientsPackaging/FoodAdditives/FoodAdditiveListings/ucm091048.htm |archive-date=January 17, 2012 }}</ref> Canada,<ref name="health.canada.ca">Health Canada {{cite web |title=List of permitted preservatives (lists of permitted food additives) - Government of Canada |url=https://www.canada.ca/en/health-canada/services/food-nutrition/food-safety/food-additives/lists-permitted/11-preservatives.html |website=Government of Canada |date=November 27, 2006 |access-date=October 27, 2022 |archive-date=October 27, 2022 |archive-url=https://web.archive.org/web/20221027020735/https://www.canada.ca/en/health-canada/services/food-nutrition/food-safety/food-additives/lists-permitted/11-preservatives.html |url-status=live }}</ref> Australia and New Zealand<ref name="comlaw.gov.au">Australia New Zealand Food Standards Code{{cite web |url=http://www.comlaw.gov.au/Details/F2011C00827 |title=Standard 1.2.4 – labeling of ingredients |date=September 8, 2011 |access-date=October 27, 2011 |archive-date=September 2, 2013 |archive-url=https://web.archive.org/web/20130902084805/http://www.comlaw.gov.au/Details/F2011C00827 |url-status=live }}</ref>)
# E301 [[sodium ascorbate]] (approved for use as a food additive in the UK,<ref name="food.gov.uk"/> US,<ref name="US Food and Drug Administration">{{cite web |url=https://www.fda.gov/Food/FoodIngredientsPackaging/FoodAdditives/ucm191033.htm#ftnT |title=Listing of food additives status part II |website=US Food and Drug Administration |access-date=October 27, 2011 |archive-date=November 8, 2011 |archive-url=https://web.archive.org/web/20111108002304/https://www.fda.gov/Food/FoodIngredientsPackaging/FoodAdditives/ucm191033.htm#ftnT |url-status=live }}</ref> Canada,<ref name="health.canada.ca"/> Australia and New Zealand<ref name="comlaw.gov.au"/>)
# E302 [[calcium ascorbate]] (approved for use as a food additive in the UK,<ref name="food.gov.uk"/> US<ref name="fda.gov"/> Canada,<ref name="health.canada.ca"/> Australia and New Zealand<ref name="comlaw.gov.au"/>)
# E303 [[potassium ascorbate]] (approved in Australia and New Zealand,<ref name="comlaw.gov.au"/> but not in the UK, US or Canada)
# E304 fatty acid esters of ascorbic acid such as [[ascorbyl palmitate]] (approved for use as a food additive in the UK,<ref name="food.gov.uk"/> US,<ref name="fda.gov"/> Canada,<ref name="health.canada.ca"/> Australia and New Zealand<ref name="comlaw.gov.au"/>)

The stereoisomers of Vitamin C have a similar effect in food despite their lack of efficacy in human scurvy. They include [[erythorbic acid]] and its sodium salt (E315, E316).<ref name="food.gov.uk"/>