Anemia and Low Ferritin

Low iron drains energy, mood, focus, and hair growth, even before anemia shows. We find why iron is low, read red cell patterns, and restore iron, B12, folate, and digestion.

What you may be noticing

Fatigue that sleep does not fix. Breathlessness climbing stairs. Cold hands and feet, hair shedding in the shower, brittle nails, restless legs, headaches, low mood, and scattered focus. Some people crave ice or crunchy textures. You may have been told your blood count is normal, yet you feel depleted.

Black or bloody stools, vomiting blood, chest pain, fainting, or severe shortness of breath need emergency care. Unexplained iron deficiency, especially in men and in women after menopause, always needs a medical search for blood loss.

Why it is rarely one thing

Iron deficiency develops in stages. Iron stores fall first, shown by a low ferritin, and only later does hemoglobin drop and anemia appear. Many symptoms begin in that first stage, which is why a normal blood count does not always mean your iron is sufficient. Reference ranges are built to detect disease, so I read patterns rather than single numbers.

Red cell indices tell a richer story than a pass or fail. Red cell size, the MCV, reflects methylation and the one-carbon nutrients B12 and folate, along with thyroid, liver, and alcohol. Hemoglobin concentration, the MCHC, reflects how well iron is delivered into hemoglobin, which depends on copper, vitamin A, B6, and riboflavin. Inflammation raises a hormone called hepcidin that locks iron away, so ferritin can look acceptable while iron is unavailable to your cells.

The central question is why iron is low. Heavy periods are a common cause. Low stomach acid, celiac disease, gut inflammation, and acid-suppressing medications reduce absorption, which is why I begin with the gut. Pregnancy, endurance exercise, and plant-based diets increase need, and blood loss from the gut must always be ruled out.

Patterns we look for

• Ferritin, serum iron, TIBC, and transferrin saturation.
• Complete blood count with red cell size, concentration, and distribution width, plus reticulocytes when indicated.
• B12 with methylmalonic acid, folate, and homocysteine.
• Menstrual blood loss.
• Digestive absorption: stomach acid, celiac disease, and gut inflammation.
• Hidden blood loss from the gut.
• Inflammation that can distort ferritin and restrict iron use.
• Thyroid and liver function.
• Copper, vitamin A, B6, and riboflavin, which help move iron into red cells.

How I evaluate it

The comprehensive functional neurological exam assesses fatigue patterns, autonomic responses, balance, and cognitive processing, which iron deficiency often affects. Low iron also influences dopamine and thyroid hormone production, so its effects reach mood and focus.

Functional labs may include a complete blood count, reticulocytes, ferritin, a full iron panel, B12 with methylmalonic acid, folate, homocysteine, celiac screening, inflammatory markers, a thyroid panel, and liver enzymes, with intracellular nutrient testing when serum results and symptoms disagree. Evaluation for gut blood loss is arranged through your physician when indicated.

How we address it

• Identify the cause, coordinating with your physician and gynecologist as needed.
• Address heavy periods and their hormonal drivers.
• Restore the gut first: stomach acid support, celiac and gut inflammation evaluation, and gut repair, so iron is absorbed rather than only swallowed.
• Replenish iron with the form and route your physician agrees on, paired with vitamin C-rich foods.
• Correct B12, folate, copper, and other cofactors that red cells need.
• Reduce inflammation so stored iron becomes available again.
• Retest at intervals to confirm stores and red cell patterns are improving.

In children, iron supports brain development, attention, and sleep, and low ferritin is common in picky eaters and fast-growing toddlers; your pediatrician can check it.

Iron needs balance, since too much is harmful too, so supplementation is guided by testing. When oxygen delivery returns, energy, warmth, and clarity often follow.

Book your Comprehensive Functional Medicine Eval/Neurological Exam today to discover what the contributing root causes are that are underlying your health concerns.