Low Ferritin and Vitamin D Levels Despite Supplements?
A 30-year-old female presented without any significant medical issues and takes a prenatal vitamin only when she remembers to do so daily. The patient reported experiencing persistent hair loss that began in 2025, following COVID. Previously, she enjoyed thick hair that would often snap ponytails, but since the onset of COVID, her hair has been progressively thinning, particularly around the areas above her ears. During a visit to a dermatologist, concerns arose regarding a potential psoriasis condition on her knee, prompting the doctor to order laboratory tests, including ANA and EBV, both of which returned negative results. Analysis of her lab work revealed that while most values were within normal ranges, her ferritin level was recorded at 14, indicating a potential deficiency, and her vitamin D level was significantly high at 276. She has been taking a prenatal supplement for the last year containing 15 mcg of vitamin D and 27 mg of iron, both of which meet the daily value requirements. What advice can be provided for addressing these findings?
Answers (1)

4/21/2025, 9:10:47 PM
OpenHealth AI
You’re experiencing low ferritin levels alongside high vitamin D levels, which can be concerning, especially given your hair loss. Let's break down these findings and outline actionable steps to improve your situation.
Main Points:
- Low Ferritin Level: Indicates potential iron deficiency, which can contribute to hair loss and other health issues.
- High Vitamin D Level: Suggests you may be taking in more vitamin D than your body needs, which might require adjustment.
- Hair Loss: Commonly linked to nutritional deficiencies, stress, or possible underlying conditions.
Explanation:
- Ferritin is a protein that stores iron in your body. Low levels could lead to anemia and symptoms like fatigue and hair loss. Deficiency in iron is known to affect hair growth cycles.
- Vitamin D is essential for overall health, but excessive levels can have adverse effects, including possibly causing calcium imbalance and other organ issues.
- Hair Loss following COVID-19 could be due to various reasons including telogen effluvium, where hair falls out after stress or illness, or due to nutritional deficiencies, such as iron deficiency.
Next Steps:
-
Increase Iron Intake:
- Dietary Sources: Incorporate iron-rich foods into your meals, such as red meat, poultry, fish, lentils, beans, spinach, and fortified cereals. Pairing these with vitamin C-rich foods (like citrus fruits) can help improve iron absorption.
- Consistent Supplementation: If you find dietary sources challenging to meet your needs, consider consistently taking an iron supplement (preferably in consultation with a healthcare provider to avoid over-supplementation).
-
Monitor Vitamin D Intake:
- Review Supplementation: Since your vitamin D levels are high, consider reducing the frequency or dosage of your prenatal vitamin, specifically looking at its vitamin D content. It may be helpful to stop taking additional vitamin D supplements for a while and reassess your levels in a few months, as high levels can pose risks.
- Sun Exposure: Your body produces vitamin D when exposed to sunlight. Aim for about 15-30 minutes of sun exposure a few times a week without sunscreen (depending on skin type and local weather conditions) to naturally maintain vitamin D levels without excessive supplementation.
-
Monitoring Hair Health:
- Scalp Care: Maintain good hair and scalp hygiene and consider using gentle, nourishing hair products to promote a healthier scalp environment.
- Stress Management: Since hair loss can be exacerbated by stress, consider engaging in activities that reduce stress such as yoga, meditation, or regular physical activity.
- Track Progress: Keep a diary of your dietary intake and hair condition over the next few months, noting any changes in hair growth or loss patterns.
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Follow-Up:
- Regularly check in with your healthcare provider about your iron and vitamin D levels, and consider further testing or evaluations if hair loss persists or worsens.
In conclusion, focusing on increasing your iron intake and adjusting your vitamin D supplementation should be your primary goals. If you have more questions or need further clarification, feel free to ask!
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