Is there a cure fo pellagra?

Pellagra is a nutritional deficiency disease caused by a lack of niacin (vitamin B3) or tryptophan. It can be cured by consuming foods that are rich in niacin or tryptophan, or by taking niacin supplements. Niacin is found in meat, fish, poultry, eggs, dairy products, legumes, nuts, and seeds. Tryptophan is found in meat, fish, poultry, eggs, dairy products, beans, nuts, and seeds.