Folate deficiency occurs when the body lacks sufficient folate (vitamin B9), which is important for cell division, DNA synthesis and red blood cell production. It can affect energy levels and has special relevance in pregnancy planning. Below are common causes, typical findings, and guidance on when to seek specialist input.
Folate is a B‑group vitamin needed for DNA production, cell division and formation of red blood cells. Prolonged deficiency can lead to macrocytic anemia and general symptoms such as fatigue. Adequate folate is especially important before and during pregnancy for fetal development.
Common causes include inadequate dietary intake, conditions that impair intestinal absorption (for example celiac disease or inflammatory bowel disease), chronic alcohol use, and increased physiological demand such as pregnancy. Certain medications, older age and some surgeries can also increase risk.
People with low folate may notice fatigue, weakness, pallor, shortness of breath on exertion and palpitations. Oral signs such as mouth sores or a sore, red tongue may occur. Blood tests often show low hemoglobin and enlarged red blood cells; folate levels are measured in serum or red blood cells. Similar symptoms can arise from other causes, so laboratory evaluation is important.
Diagnosis usually involves a complete blood count and serum or erythrocyte folate measurements; B12 levels and tests for malabsorption may be added if indicated. Initial assessment can be done by primary care or internal medicine. Depending on results, referral to Hematology, Gastroenterology or Obstetrics/Gynecology may be appropriate. If someone develops sudden severe shortness of breath, fainting, chest pain or very rapid heart rate, seek emergency medical care.
A balanced diet is the main way to maintain folate levels: leafy green vegetables, legumes, citrus fruits and folate‑fortified grains are good sources. People planning pregnancy or who are pregnant should discuss nutrition and monitoring with a health professional. Population measures such as fortified foods and screening programs also help reduce deficiency at community level.
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