>Except for some rare circumstances (special deficiencies and illnesses) You're begging the question by labeling vitamin deficiencies in this population as "ra

>Except for some rare circumstances (special deficiencies and illnesses) You're begging the question by labeling vitamin deficiencies in this population as "rare." But that's not true. "Vitamin D deficiency occurred in 50.5% of blacks, 29.3% of whites, and 14.3% of Asian inmates (p = 0.007). Black inmates had significantly lower serum 25(OH)D level than white inmates at the maximum security level (p = 0.015), medium security level (p = 0.001), but not at the minimum security level (p = 0.40). After adjusting for covariates black inmates at a maximum security level had a four-fold higher risk for vitamin D deficiency than white inmates at the same security level (OR 3.9 [95% CI 1.3–11.7]." https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3944727/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3944727/ Why Vitamin D? Because the 600 IU RDA (the amount prisons must legally put in their food) is way too low. Considering how cranky I get if I miss my vitamin D, it's not hard to posit a link between deficiency and increases in aggressive/violent behavior, especially in populations with a high rate of pre-existing mental illness.