Challenges with Vitamin D and Iron Absorption
In early 2024, at the age of 23, I underwent my first comprehensive blood test as an adult and discovered that I was low in both vitamin D and iron. In response, I began a regimen of supplements, taking 10,000 IU of vitamin D and 65 mg of iron daily, although I occasionally missed some doses. I ensured to take my vitamin D with meals and paired my iron intake with vitamin C to enhance absorption. Fast forward a year when I had another blood test done. To my surprise, the results indicated that my levels remained largely unchanged, with ferritin at 51 and vitamin D at 45. I am pretty sure my iron levels stayed the same while my vitamin D may have actually decreased. Additionally, I was diagnosed with hypothyroidism earlier in 2024 and have been managing it with NP thyroid medication. This makes me wonder about the underlying issue. Despite my consistent supplementation, why aren't these vitamins being absorbed properly? Could this indicate an underlying gastrointestinal issue? What steps can be taken to resolve this?
Answers (1)
7/9/2025, 1:50:45 AM
OpenHealth AI
It's understandable to be concerned about low vitamin D and iron levels despite your supplementation efforts. Absorption issues can stem from various factors, and it's good that you're seeking insight into this matter. Let’s break down the key points and next steps:
Key Points
- Iron and Vitamin D Absorption Challenges: Your ongoing low levels despite supplementation can suggest possible issues with gastrointestinal absorption or underlying health conditions.
- Thyroid Hormone Interaction: Hypothyroidism can affect nutrient absorption and metabolism, potentially complicating your supplementation effects.
Explanation
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Supplementation Insights: While taking vitamin D with meals and pairing iron with vitamin C are good practices, other factors might influence absorption. Conditions like celiac disease, inflammatory bowel disease, or even certain medications can hinder how nutrients are absorbed.
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Ferritin Levels: Your ferritin level of 51 can suggest your body has enough stored iron, but if your body isn't using it effectively, this can reflect other issues, potentially linked to your hypothyroidism or gastric health.
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Gastrointestinal Health: Possible gastrointestinal issues, even if mild, could impact how nutrients are absorbed. Symptoms like bloating, gas, or changes in stool may indicate underlying digestive concerns.
Action Steps
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Track Symptoms: Keep a diary of any digestive symptoms, including frequency and type. Note how you feel after taking supplements—this can guide further discussions about your health.
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Adjust Supplement Timing: If you haven’t already, consider taking your iron supplement in the evening. Some people find that timing can improve absorption and reduce digestive upset.
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Consider Dietary Sources: Increase your intake of foods rich in vitamin D (like fatty fish, fortified products, and egg yolks) and iron (such as red meat, beans, and leafy greens). This will provide additional sources alongside your supplements.
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Review Your Thyroid Medication: Since you have hypothyroidism, ensure your thyroid medication is well managed. Thyroid hormones can affect metabolism and nutrient absorption, and regular monitoring of your levels is important.
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Evaluate Further Testing: If your levels do not improve over the next few months, consider discussing with a healthcare provider about tests for gastrointestinal conditions (like gluten sensitivity or malabsorption syndromes) that might warrant further investigation.
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Consult a Nutritionist: If feasible, consult with a nutritionist who can customize a dietary plan focusing on improving your overall nutrient absorption.
Taking these steps can help you better understand your body’s needs and how to support your health moving forward. If you experience any concerning symptoms or changes in your health, consider seeking further professional guidance.
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