Tiredness
Fast heartbeat
Shortness of breath
Headache
Dizziness
Pale skin
Leg cramps
Inability to sleep
Bleeding
Antacids
Thyroid medication
Weight loss surgery
Crohn’s disease or ulcerative colitis
Heavy periods
Pregnancy
Celiac disease
History of duodenal surgery (Whipple, etc.)
Medications and supplements to increase your blood cells
Medications and supplements to increase your blood cells