Reading about Mary Todd was a hobby of mine for years..just fascinated by her..this is the first time I have heard anything about a vitamin deficiency.
I firmly believe she was a victim of depression made worse by the deaths of her sons and then husband....She saw only one son reach adulthood, Robert. Robert thought she was insane and had her committed when she was just 56yo.
I always believed her to be a overlooked tragic figure.......poor woman!