编辑“︁烟酸”︁（章节）

== 攝取不足後遺症 ==
# 疲勞，倦怠，頭痛，噁心，嘔吐，背痛，體重減輕。
# 食慾喪失，舌炎，胃酸缺乏，對稱性皮膚炎，神經症狀。
# [[癩皮病]]末期時出現嚴重之皮膚炎，腹瀉，失智，甚而死亡。
烟酸缺乏症在发达国家很少见<ref>{{cite web |author1=Sasa Redzic |author2=Muhammad F. Hashmi |author3=Vikas Gupta |title=Niacin Deficiency |url=https://www.ncbi.nlm.nih.gov/books/NBK557728/ |website=National Library of Medicine |publisher=nih.gov |accessdate=2025-06-10 |archive-date=2024-06-16 |archive-url=https://web.archive.org/web/20240616074836/https://www.ncbi.nlm.nih.gov/books/NBK557728/ |dead-url=no }}</ref>，它大多數与贫困、营养不良或後天性慢性酒精中毒 ([[酒精依賴]]) 的营养不良有关。<ref>{{cite journal| author=Pitsavas, S., Andreou, C., Bascialla, F., Bozikas, V. P., & Karavatos, A. | date=2004 | title=Pellagra Encephalopathy following B-Complex Vitamin Treatment without Niacin | url=https://doi.org/10.2190/29XV-1GG1-U17K-RGJH }}</ref>它也倾向于发生在開發中國家 ，因為當地人以玉米作为主食，但玉米卻是唯一含可消化烟酸量低的粮食。因此许多国家强制要求在小麦粉或其他粮食中添加该物质，从而降低了患糙皮病的风险<ref name ="test">{{cite web
| url =http://www.ffinetwork.org/why_fortify/index.html
| title =Why Fortify?
| year =2017
| publisher =Food Fortification Initiative
| website =https://www.ffinetwork.org/why_fortify/index.html
| access-date =2017-04-04
| quote =
| archive-date =2017-04-04
| archive-url =https://web.archive.org/web/20170404131451/http://www.ffinetwork.org/why_fortify/index.html
| dead-url =yes
}}</ref>
[[File:Pellagra NIH.jpg|none|210px|thumb|[[糙皮病]],飲食長期缺乏維生素B<SUB>3</SUB>]]