Summarize this article in one sentence.
If you have symptoms of anemia or think you may be at risk, it’s very important to see your doctor before attempting to treat or prevent it yourself. Different forms of anemia require different kinds of treatment, and some may be dangerous if not treated properly.  If you’re fatigued for no obvious reason, see your doctor. While fatigue doesn’t necessarily mean you have anemia, it is a common symptom of anemia and a variety of other medical conditions. Your doctor can run a variety of blood tests to determine whether you have anemia and what may be causing it. In some cases, they may need to take a sample of your bone marrow or do other tests to look for underlying causes of your anemia.  People with mild anemia may have no symptoms at all and may find out about it accidentally. For example, you might discover that you have low hemoglobin levels when you try to donate blood. If this happens, see your doctor. While dietary supplements can be helpful for certain types of anemia, not all anemias are caused by vitamin or mineral deficiencies. Taking supplements to treat or prevent anemia could be unhelpful or even do more harm than good depending on the type of anemia. Talk to your doctor before trying any new supplements.  For example, iron supplements can cause organ damage in people with sickle cell anemia.  Some supplements can interfere with medications you are taking. Before starting any supplement, talk to your doctor about your health history and give them a full list of medications and supplements you are currently taking.

Summary:
See your doctor if you suspect you have anemia. Talk to your doctor before trying supplements.