Who may not be able to take folic acid: Folic acid is not suitable for some people. To make sure it's safe for you, tell your doctor before starting to take folic acid if you:
have ever had an allergic reaction to folic acid or any other medicine; have low vitamin B12 levels (vitamin B12 deficiency anaemia) or pernicious anaemia; have cancer (unless you also have folate deficiency anaemia); are having a type of kidney dialysis called haemodialysis ; have a stent in your heart; Therefore, you should understand before choosing and taking folic acid.