Why Your Ferritin of 30 May Still Be Too Low
You were told your iron is “normal.”
But you’re still exhausted.
Your hair is thinning.
Your workouts feel harder.
Your mood feels flat.
And your ferritin is 30. Technically normal. But possibly not optimal. Let’s unpack why.
What Is Ferritin?
Ferritin is your iron storage protein. It tells us how much iron your body has in reserve — not just what’s circulating in your bloodstream that day. Think of it like your savings account. Your serum iron is what’s in your wallet. You can have “normal iron” but very low reserves.
The Lab Range Problem
Most conventional labs list ferritin normal ranges roughly like:
• 16–154 ng/mL (varies by lab)
That range is statistical — not optimal. It simply reflects where 95% of the population falls. It does not reflect where people feel their best. In functional medicine, many women feel significantly better when ferritin is: 50–100 ng/mL (sometimes higher depending on the individual) A ferritin of 30 may prevent anemia… But it may not support optimal energy, hair growth, thyroid function, or exercise tolerance.
Symptoms of Suboptimal Ferritin
• Persistent fatigue
• Hair shedding or thinning
• Cold intolerance
• Shortness of breath with exertion
• Restless legs
• Anxiety or low mood
• Poor recovery from workouts
This is especially common in:
• Menstruating women
• Perimenopausal women
• Women with heavy periods
• Endurance exercisers
•Those with digestive issues affecting absorption
Why “Normal Iron” Isn’t Enough
Many patients are told: “Your hemoglobin is normal, so you’re fine.” But hemoglobin drops late in iron depletion. Ferritin falls first. By the time anemia shows up, iron stores have often been low for a long time.
Ferritin and Thyroid Function
This is important. Iron is required for proper thyroid hormone conversion.
Low ferritin can:
• Worsen fatigue even if TSH is normal
• Impair T4 → T3 conversion
• Make thyroid medication feel less effective So if you’re “treated” for thyroid but still tired, ferritin deserves attention.
Why We Look at Iron Differently in Functional Medicine
At Balanced, we evaluate:
• Ferritin
• Serum iron
• Symptoms
• Menstrual patterns
• Diet
• GI absorption
• Inflammation markers
We don’t treat a number in isolation. And we don’t automatically supplement without understanding why iron is low. Is it heavy cycles? Poor absorption? Gut inflammation? Dietary insufficiency? Addressing root cause matters.
Should You Supplement? Not necessarily blindly.
Iron supplementation can:
• Cause constipation
• Irritate the gut
• Increase oxidative stress if unnecessary
The right dose, form, and duration depend on the whole clinical picture. And yes — too much iron can be harmful. This is where personalized care matters.
When to Consider Re-Checking Ferritin If you have fatigue, hair thinning, or persistent symptoms despite “normal labs,” it may be worth: Reviewing ferritin trends over time, Evaluating menstrual blood loss, Looking at thyroid interplay, Assessing diet and gut health Numbers don’t exist in isolation.
The Bottom Line A ferritin of 30 may be within lab range. But it may not be optimal for you. If you’re exhausted and being told “everything looks fine,” it may be time for a deeper look. Want a More Nuanced Lab Review? At Balanced Wellness, we take a root-cause, whole-person approach to health. If you’d like a comprehensive evaluation, please schedule a visit. We would love to meet with you!