21. Anthony's 5-year-old sister, Anna, was born with a cleft palate, also caused by vitamin A deficiency . 22. Addition issues that can occur in tame dragons are vitamin A deficiency and metabolic bone disease. 23. People with vitamin A deficiency experience night blindness. 24. According to Bassey, Golden Rice, developed in 1999 to treat vitamin A deficiency , had fundamental problems. 25. In areas of the world where malnutrition is common, vitamin A deficiency is a common cause. 26. Vitamin A deficiency is common in sub-Saharan Africa.27. The only people in need of supplements would be those with vitamin A deficiencies , which are uncommon. 28. Along with the shift away from traditional foods, there has been a rise in vitamin A deficiency . 29. Semba said he believed that vitamin A deficiency could be an important factor in explaining the differences. 30. Carrots aren't going to help your eyesight unless you have a vitamin A deficiency , which is unlikely.