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We tell patients with lupus erythematosus (LE) to avoid sun exposure, use sunscreen, and wear protective clothing. It would not be surprising to find vitamin D insufficiency in patients who do so. In a recent study1 comparing 55 patients with cutaneous lupus erythematosus (CLE) and 37 healthy controls, researchers found lower vitamin D levels and higher parathyroid hormone levels in the CLE patients. Ninety-five percent of CLE patients had deficient or insufficient D levels; those treated with antimalarial therapy had lower levels, and recipients of vitamin D supplementation had higher levels. These findings did not demonstrate a role for vitamin D treatment of cutaneous LE, and it is unknown whether vitamin…