Vitamin D deficiency is very common with
Lupus (one study showing 96% of
lupus patients deficient in
vitamin D) however the body will lower vitamin D when calcium is high as a protective mechanism to prevent extra calcium being absorbed from the diet.
Anaemia is a frequent occurrence in SLE and causes include inflammation, renal (kidney) insufficiency, blood loss, dietary insufficiency, medications, hemolysis, infection, hypersplenism, myelofibrosis, myelodysplasia, and aplastic anaemia.