stack pro Caution and Side Effects You should be very cautious using any complement which is not clear about the components or their dose. iron stack pro does not tell much about the components that go into it. There is the usual disclaimer that it has not been “evaluated by the FDA.” And that its not meant to “treat, cure or prevent any disease.” The disclaimer also warns to seek advice from your physician to avoid any medical concerns. This might be the best advice. You should create sure to ask your physician for advice before using it. There are too few to nil on the internet opinions. So we cannot know their