When women come to me feeling exhausted, foggy, anxious, or frustrated with hair shedding, one of the first labs I look at is ferritin.
Most people are told their iron is “normal.” But ferritin tells a much deeper story. And for women, low ferritin is incredibly common.
What Is Ferritin?
Ferritin is your body’s iron storage protein. Think of it as your iron savings account. Even if your hemoglobin (the number used to diagnose anemia) looks normal, your ferritin can be depleted — and that’s when symptoms begin. Many labs list ferritin “normal” ranges as low as 10–15 ng/mL. But from a functional perspective, most women feel best when ferritin is closer to: 50–100 ng/mL (Some women need levels even higher to resolve symptoms.)
Why Are Women So Prone to Low Ferritin?
- Women are uniquely vulnerable because of:
- Monthly menstrual blood loss
- Heavy periods
- Pregnancy & postpartum depletion
- Restrictive dieting
- Vegetarian or low-red-meat diets
- Gut absorption issues
- Chronic stress & inflammation
Over time, iron stores quietly decline — sometimes for years.
Symptoms of Low Ferritin (Even Without Anemia)
You do NOT have to be anemic to feel the effects.
Low ferritin can cause:
- Chronic fatigue Feeling tired even after a full night of sleep.
- Hair shedding or thinning Ferritin below ~40–50 is strongly associated with diffuse hair loss in women.
- Brain fog Poor concentration, forgetfulness, low motivation.
- Anxiety & mood changes Iron is required for dopamine and serotonin production.
- Exercise intolerance Shortness of breath or rapid heart rate with exertion.
- Cold intolerance Always the one wearing a sweater.
- Restless legs at night
Many women are told their symptoms are “just stress” or “hormonal.” Sometimes it’s simply iron depletion.
Low Ferritin & Hormones Iron plays a critical role in:
- Thyroid hormone production
- Ovulation Progesterone balance
- Adrenal function
- Low ferritin can worsen:
- PMS
- Irregular cycles
- Hair loss related to thyroid dysfunction
- Perimenopause symptoms
If you are working on hormone optimization but haven’t addressed ferritin, you may be missing a foundational piece.
What Causes Low Ferritin Beyond Heavy Periods?
If ferritin is low, we ask why.
Possible root causes include:
- Heavy or prolonged menstrual bleeding
- Uterine fibroids
- Endometriosis
- Gut inflammation
- Low stomach acid
- Celiac disease or gluten sensitivity
- H. pylori infection
- Chronic inflammation
- Frequent blood donation
Functional care means identifying the underlying reason — not just handing out iron supplements.
Should You Supplement Iron? Not automatically. Iron is powerful — and too much can be harmful.
Before supplementing, testing should include:
- Ferritin
- Serum iron
- TIBC
- Transferrin saturation
- CBC
When appropriate, iron supplementation should be:
- The correct form
- The correct dose
- Paired with vitamin C (if needed)
- Monitored over time
Many women either take too little and see no improvement — or take too much and experience GI side effects.
The Functional Medicine Approach to Iron Optimization
At Far Out Alternative Care, we:
- Assess full iron panels — not just hemoglobin
- Identify the root cause of depletion
- Optimize digestion and absorption
- Create a personalized repletion plan
- Monitor levels safely
Because ferritin isn’t just a number — it’s energy, focus, hair health, hormone balance, and resilience.
If You’re Feeling Exhausted, It’s Worth Checking
If you’ve been told your labs are “normal” but you:
- Feel constantly tired
- Are losing hair
- Struggle with brain fog
- Have heavy cycles
- Feel worse during perimenopause
Ferritin may be the missing piece.
You deserve to feel vibrant — not depleted.
Reach out to see if we can help
Emily Zielinski
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