For those who dwell exterior the growing world, there’s a great likelihood that you just’ve by no means heard of, not to mention seen, the situation often known as pellagra. The crippling situation is a results of an absence of niacin and tryptophan within the weight-reduction plan (or, in what is named secondary pellagra, the shortcoming to course of stated vitamins due to alcoholism, treatment negative effects, or different illness processes).
The results of pellagra embrace pores and skin scaling and lesions, heightened sensitivity to daylight, aggression, insomnia, and, ultimately, nerve harm and loss of life. Fortuitously, like most dietary deficiencies, it takes a major and prolonged interval of deficiency to create severe issues and, if handled, the survival price is excessive. Though unparalleled in the USA as we speak exterior of remoted instances, pellagra was as soon as an epidemic-sized drawback within the American South the place tens of millions of individuals within the early 20th century have been affected (with greater than 100,000 deaths). Niacin deficiency has induced extra deaths than another nutrition-related illness in American historical past. Supplementation and meals preparation strategies that elevated niacin consumption decreased, after which lastly eradicated the dysfunction by the 1940s.
For those who’re curious as to how Southerners ended up with such a niacin deficit, there are a number of competing and overlapping theories, probably the most attention-grabbing and compelling of which hinges on the style by which the corn they consumed was ready. Southerners have lengthy used corn meal in quite a lot of meals (the affiliation between the South and corn bread, for instance, is effectively based) and corn is excessive in niacin, so how then did so many Southerners find yourself niacin poor? A change in preparation strategies and a need to protect corn meal for longer intervals was the turning level. Traditionally, corn was floor utilizing a millstone, leaving the niacin content material nutritionally obtainable. Later, when milling was industrialized, the method stripped away extra of the outer coating (grit) of the corn kernel (the place a lot of the niacin was) as a way to take away oils and preserve the milled corn from spoiling.
Picture courtesy of the Waring historic Library/Wikimedia.