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the late 19th century, when it became epidemic especially in the Southern United States. In the early 1900s, pellagra reached epidemic proportions in the American South. Between 1906 and 1940 more than 3 million Americans were affected by pellagra with more than 100,000 deaths, yet the epidemic resolved itself right after dietary niacin fortification. Pellagra deaths in South Carolina numbered 1,306 during the first 10 months of 1915; 100,000 Southerners were affected in 1916. At this time, the scientific community held that pellagra was probably

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