A low-fat, plant-based diet is the best choice for most people, including those with thalassemia. However, you may need to limit iron-rich foods if you already have high iron levels in your blood. Thalassemia can cause folic acid (folate) deficiencies. Naturally found in foods such as dark leafy greens and legumes, this B vitamin is essential for warding off the effects of high iron levels and protecting red blood cells. There