Editing Vitamin E (section)

=== Food labeling ===
For US food and dietary supplement labeling purposes, the amount in a serving is expressed as a percent of daily value. For vitamin E labeling purposes 100% of the daily value was 30 [[international unit]]s (IUs), but as of May 2016, it was revised to 15&nbsp;mg to bring it into agreement with the RDA.<ref name="FedReg">{{cite web |url=https://www.gpo.gov/fdsys/pkg/FR-2016-05-27/pdf/2016-11867.pdf |title=Federal Register May 27, 2016 food labeling: revision of the nutrition and supplement facts labels. FR page 33982. |access-date=31 August 2017 |archive-date=8 August 2016 |archive-url=https://web.archive.org/web/20160808164651/https://www.gpo.gov/fdsys/pkg/FR-2016-05-27/pdf/2016-11867.pdf |url-status=live }}</ref> A table of the old and new adult daily values is provided at [[Reference Daily Intake]].

European Union regulations require that labels declare energy, protein, fat, saturated fat, carbohydrates, sugars, and salt. Voluntary nutrients may be shown if present in significant amounts. Instead of daily values, amounts are shown as percent of reference intakes (RIs). For vitamin E, 100% RI was set at 12&nbsp;mg in 2011.<ref>{{cite journal |title=Regulation (EU) No 1169/2011 of the European Parliament and of the Council |journal=Official Journal of the European Union |volume=22 |issue=11 |pages=18–63 |year=2011 |url=http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2011:304:0018:0063:EN:PDF |access-date=21 February 2018 |archive-date=26 July 2017 |archive-url=https://web.archive.org/web/20170726215901/http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ%3AL%3A2011%3A304%3A0018%3A0063%3AEN%3APDF |url-status=live }}</ref>

The international unit measurement was used by the United States in 1968–2016. 1 IU is the biological equivalent of about 0.667&nbsp;mg d (RRR)-alpha-tocopherol (2/3&nbsp;mg exactly), or of 0.90&nbsp;mg of dl-alpha-tocopherol, corresponding to the then-measured relative potency of stereoisomers. In May 2016, the measurements were revised, such that 1&nbsp;mg of "Vitamin E" is 1&nbsp;mg of d-alpha-tocopherol or 2&nbsp;mg of dl-alpha-tocopherol.<ref name=NIH-Calc>{{cite web |title=Unit conversions |url=https://dietarysupplementdatabase.usda.nih.gov/Conversions.php |publisher=National Institutes of Health |access-date=21 November 2018 |archive-date=27 April 2021 |archive-url=https://web.archive.org/web/20210427102806/https://dietarysupplementdatabase.usda.nih.gov/Conversions.php |url-status=live }}</ref> The change was originally started in 2000, when forms of vitamin E other than alpha-tocopherol were dropped from dietary calculations by the IOM. The UL amount disregards any conversion.<ref>{{cite web|archive-url=https://web.archive.org/web/20120219164132/http://www.nal.usda.gov/fnic/foodcomp/Data/SR20/SR20_doc.pdf |archive-date=19 February 2012 |url=https://www.ars.usda.gov/ARSUserFiles/80400525/Data/SR20/SR20_doc.pdf |title=Composition of foods raw, processed, prepared USDA national nutrient database for standard reference, Release 20 |publisher=USDA |date=February 2008 |url-status=dead }}</ref> The EFSA has never used an IU unit, and their measurement only considers RRR-alpha-tocopherol.<ref>{{cite journal |title=Scientific opinion on dietary reference values for vitamin E as α-tocopherol |journal=EFSA Journal |date=July 2015 |volume=13 |issue=7 |doi=10.2903/j.efsa.2015.4149 |s2cid=79232649 |quote=only 2R-α-tocopherol stereoisomers were found to meet human requirements for the vitamin... Currently, only RRR-α-tocopherol is considered to be the physiologically active vitamer.| doi-access = free | title-link = doi }}</ref>