Ferritin
Storage iron; can also rise with inflammation.
Labs & Blood Tests · Topic guide
Iron & Ferritin Testing
Ferritin reflects stored iron. Iron studies help clinicians evaluate deficiency and related contributors to fatigue, brain fog, hair shedding, or restless legs—when history suggests testing may help.
Available across California · Texas · Pennsylvania · Florida
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Already have results? We’ll help interpret them too.
Not sure which tests fit? Start with a clinical conversation.
When testing may be appropriate
Not every symptom requires laboratory testing. These are common reasons clinicians consider it.
- Fatigue, brain fog, or restless legs with other iron-deficiency clues
- Heavy or prolonged menstrual bleeding
- Restrictive diets, low iron intake, or GI conditions that affect absorption
- Follow-up after a previously low ferritin or documented deficiency
Commonly discussed tests
Examples only—availability and panels vary on the storefront. Your clinician individualizes orders.
Serum iron / TIBC / transferrin saturation
Often ordered together as iron studies.
Complete blood count (CBC)
Helps assess anemia and related patterns.
A thoughtful starter set (education, not a product list)
When iron deficiency is a real question, clinicians often start with a small, interpretable set—not every iron-related assay at once.
- Ferritin
- Iron studies (serum iron, TIBC, transferrin saturation)
- Complete blood count (CBC)
Availability varies; a clinician individualizes which tests—if any—fit your history. This is education, not a catalogue of SKUs.
What these tests cannot tell you
Clear limits protect you from false certainty.
- Ferritin alone does not diagnose ADHD.
- A “normal” ferritin within a wide lab range may still be low for your clinical goals—context matters.
- High ferritin is not always “good iron”—inflammation and other conditions can elevate it.
Iron status should be interpreted with symptoms, menstrual history, diet, inflammation markers when relevant, and trends over time—not a single number in isolation.
Related care & reading
Services
Guides
More lab topics
Frequently asked questions
Ferritin reflects stored iron. Low ferritin can support evaluation of iron deficiency. Ferritin can also rise with inflammation, so clinicians interpret it in context.
Generally no. Unnecessary iron can cause side effects and, over time, iron overload risk in some people. Testing first is the safer path when deficiency is suspected.
No good evidence supports that iron deficiency causes ADHD. Low iron can contribute to overlapping symptoms like fatigue and poor concentration, which is why ferritin is sometimes checked as part of a broader evaluation.
Browse tests—or talk it through
Transparent direct-pay pricing on the storefront. Physician guidance when you need help choosing or interpreting.