Numbers · Lots of talk

Ferritin

Also called iron panel · low ferritin · ferritin women · tired iron

Community talk. May contain inaccuracies. Not medical or health advice. No result or safety is promised.

Ferritin is a protein that stores iron. A ferritin blood test helps estimate your iron reserves and can be part of investigating fatigue or weakness. Low and high results both need interpretation alongside your health history.

MedlinePlus · 2025

What the number tells you

Iron stores and anemia are different questions. A complete blood count (CBC) measures hemoglobin to assess anemia. Low ferritin can reveal depleted reserves before hemoglobin falls.

BC Guidelines · 2019

A low result can mean depleted reserves. WHO uses below 15 µg/L for iron deficiency in apparently healthy adults aged 20–59, and below 70 µg/L with infection or inflammation. These are context-dependent diagnostic cutoffs, not personal targets or permission to take iron.

WHO

Inflammation can conceal low iron stores. Inflammation can raise ferritin despite depleted reserves. Clinicians may use transferrin saturation—the proportion of an iron-carrying protein carrying iron—to clarify the picture.

BC Guidelines · 2019

Testing involves a blood sample. A clinician or lab takes blood from a vein. Preparation depends on the ordered tests; the provider may request fasting. The draw itself usually takes less than five minutes.

MedlinePlus · 2025

Follow-up investigates why stores are low. Diet, donation, heavy periods, bleeding and poor absorption are possible causes. Unexplained deficiency in men or after menopause may require gastrointestinal investigation.

BC Guidelines · 2019

What testing can help with

It can identify an iron-related problem. Ferritin can help a clinician investigate suspected deficiency or overload. The benefit is information that guides care; having a test does not itself restore energy.

MedlinePlus · 2025

Follow-up tests can track a treatment response. Timing depends on severity and cause; stores can recover more slowly than hemoglobin. Persistent low results prompt reassessment of bleeding, absorption or diagnosis.

BC Guidelines · 2019

Good to know before chasing a number

High ferritin does not automatically mean iron overload. Inflammation, liver disease and other conditions can raise it. Clinical history, transferrin saturation and further testing help distinguish causes; a high value is not a fitness achievement.

BC Guidelines · 2021

Iron supplements have real risks. Excess iron can cause stomach problems and serious poisoning, especially in children. It can also interfere with medicines such as levothyroxine. A ferritin screenshot is not a treatment plan.

NIH ODS · 2023

A commercial panel still needs clinical follow-up. Function lists ferritin among its nutrient tests and states that its service does not provide diagnosis or treatment. A panel result still belongs in a discussion with a licensed clinician.

Function Health

From fatigue, training and follow-up discussions

These are personal reports and discussion, not proof that ferritin caused every symptom or that someone else's treatment will work for you.

Symptoms and recovery beyond the lab number

Normal hemoglobin can feel like an incomplete answer. A half-marathon runner reported ferritin of 21 with normal hemoglobin after even short runs became difficult. Replies ranged from improved energy to trouble keeping levels up and difficulty qualifying for infusions.

Community · Reddit r/XXRunning

Better numbers do not always mean a quick return to running. One runner described ferritin rising from 0 to 36 over four months but only slight running improvement after blood donation. Other replies described substantially better energy after treatment. These accounts do not establish a recovery timetable.

Community · Reddit r/running

Hair shedding and feeling cold also bring people to ferritin. Accounts include fatigue, hair worries and disappointing training despite an ordinary blood count, across heavy-period, postpartum, plant-forward and male experiences. Those concerns are reasons people seek explanations, not confirmation of an iron diagnosis.

Community

Treatment tolerability

Tolerability varies, even within the same discussion. In one running thread, some reported no bowel problems with oral iron; another described every preparation tried upsetting their gut. A commenter felt better within two weeks of a clinician-recommended infusion, while others described slow progress or limited access.

Community · Reddit r/XXRunning · 2026

Stomach symptoms can interrupt a treatment plan. An account described bloating, loose stools and nausea after prescribed iron, followed by contacting hematology. The poster also had substantial gastrointestinal history, so attributing every symptom to iron would oversimplify the story.

Community · Reddit r/Anemic

Online targets and clinical follow-up

“Optimal” ranges can become a moving goalpost. People compare lab intervals with runner or influencer targets and disagree about what feels normal. Some describe relief from finding an explanation; others spiral into repeated checks and new supplement protocols.

Community

The appointment is easier with the actual report. People describe keeping the value, units, date and printed range alongside symptoms, menstrual flow, mileage, diet, gut history and supplements already used. Some ask about ferritin with other labs; cost and coverage affect access.

Community

Retesting and training changes are part of the follow-up conversation. Reports describe clinician-planned checks over weeks or months, recording energy and run quality, and easing training during severe fatigue. Coffee or calcium timing can complicate prescribed routines; sleep and adequate food still enter the discussion.

Community

References for this topic

Sources and context

Ferritin Blood Test ↗
id
self-guide-ferritin-medlineplus — Ferritin Blood Test
platform
MedlinePlus, National Library of Medicine
role
Official context
accessed On
2026-09-24
locator
What the test is, why it is done, preparation, and what results mean
scope
Ferritin measures stored iron and is often grouped with other iron tests. Low or high iron can be serious. Inflammation and several diseases can raise ferritin. The provider may request a 12-hour fast. The test may follow a low hemoglobin or hematocrit and may be repeated to monitor treatment.
limitations
Does not print one national reference range, a supplement dose, or a retest interval.
slugs
- ferritin
New thresholds for the use of ferritin concentrations to assess iron status in individuals and populations ↗
id
self-guide-ferritin-who-brochure — New thresholds for the use of ferritin concentrations to assess iron status in individuals and populations
platform
World Health Organization
role
Official context
accessed On
2026-09-24
locator
Table 1 and footnotes on the ferritin guideline brochure
scope
The brochure's adult cut-offs, ages 20 to 59: deficiency under 15 micrograms per liter if apparently healthy, under 70 with infection or inflammation, overload risk above 150 in females and above 200 in males if apparently healthy, and above 500 in non-healthy individuals as a prompt for further evaluation. Inflammation markers are assessed alongside ferritin.
limitations
A summary brochure of the WHO guideline, not a personal treatment target. Age bands in the full guideline document were not re-opened in this run. It does not set supplement doses.
slugs
- ferritin
Ferritin Blood Test ↗
id
self22b8-ferritin-medline — Ferritin Blood Test
slugs
- ferritin
role
Official context
platform
MedlinePlus / National Library of Medicine
locator
Definition; uses; sample; preparation
scope
Test identity, care uses and blood draw.
limitations
No universal range or symptom guarantee.
accessed On
2026-09-29
updated On
2025-03-18
Iron Deficiency – Diagnosis and Management ↗
id
self22b8-ferritin-deficiency — Iron Deficiency – Diagnosis and Management
slugs
- ferritin
role
Professional context
platform
Province of British Columbia / BC Guidelines
locator
Key recommendations; Table 2; inflammation; etiology; monitoring
scope
Non-anemic deficiency, confounding, causes and response assessment.
limitations
2019 regional guidance; not individualized care.
accessed On
2026-09-29
published On
2019-04-17
New thresholds for the use of ferritin concentrations to assess iron status in individuals and populations ↗
id
self22b8-ferritin-who — New thresholds for the use of ferritin concentrations to assess iron status in individuals and populations
slugs
- ferritin
role
Official context
platform
World Health Organization
locator
Table 1 adult row; footnotes b–e; both PDF pages
scope
Context-specific adult thresholds.
limitations
Brochure has no visible publication date; diagnostic cutoffs are not personal goals.
accessed On
2026-09-29
High Ferritin and Iron Overload – Investigation and Management ↗
id
self22b8-ferritin-high — High Ferritin and Iron Overload – Investigation and Management
slugs
- ferritin
role
Professional context
platform
Province of British Columbia / BC Guidelines
locator
Key Recommendations; Diagnosis
scope
Raised ferritin and further evaluation.
limitations
Adult outpatient guidance, not screening advice.
accessed On
2026-09-29
published On
2021-06-30
Iron: Fact Sheet for Consumers ↗
id
self22b8-ferritin-ods — Iron: Fact Sheet for Consumers
slugs
- ferritin
role
Official context
platform
NIH Office of Dietary Supplements
locator
Can iron be harmful?; medication interactions; packaging warning
scope
Toxicity, gastrointestinal effects and interactions.
limitations
General supplement facts, not a ferritin treatment plan.
accessed On
2026-09-29
updated On
2023-08-17
Nutrients biomarkers ↗
id
self22b8-ferritin-function — Nutrients biomarkers
slugs
- ferritin
role
Service rules
platform
Function Health
locator
Nutrients Tests; service footer
scope
Ferritin listing and service boundaries.
limitations
Commercial first-party information; no independent outcome evidence; no visible article date.
accessed On
2026-09-29
Low (?) ferritin ↗
id
self22b8-ferritin-normal-hb — Low (?) ferritin
slugs
- ferritin
role
Community discussion
platform
Reddit r/XXRunning
locator
Opening post; braveygal; lettersinthesand; 3catcaper replies
scope
Normal hemoglobin, impaired runs, improvement and access friction.
limitations
Self-reported; deleted OP identity; relative page timestamps differ from search indexing. No exact date asserted.
accessed On
2026-09-29
Iron deficient runners? ↗
id
self22b8-ferritin-slow-recovery — Iron deficient runners?
slugs
- ferritin
role
Community discussion
platform
Reddit r/running
locator
OP and follow-up 0-to-36 result; skragen; quiggsley95 replies
scope
Slow performance recovery despite a rising result; contrasting improvement.
limitations
Self-report without independently verified labs; commenters differ in severity and treatment; relative timestamps only; protocols not endorsed.
accessed On
2026-09-29
Anyone else have super low ferritin levels kill their motivation and energy to run? ↗
id
self22b8-ferritin-mixed-treatment — Anyone else have super low ferritin levels kill their motivation and energy to run?
slugs
- ferritin
role
Community discussion
platform
Reddit r/XXRunning
locator
OP; Independent-Cod-3167; Upset-Interest9441; lettersinthesand; Active_Ganache4303; Specific-Pear-3763
scope
Mixed gut tolerance, response timing and treatment access.
limitations
Personal accounts; different conditions and healthcare systems; no efficacy comparison.
accessed On
2026-09-29
published On
2026-06-28
Iron has destroyed my stomach ↗
id
self22b8-ferritin-stomach — Iron has destroyed my stomach
slugs
- ferritin
role
Community discussion
platform
Reddit r/Anemic
locator
GrimThreadGraphics OP and StraightMagician9913 replies
scope
Treatment disruption and clinician contact with significant gut history.
limitations
Self-report with major confounding gastrointestinal conditions; search shows September 5 but opened page says 15 hours ago, so exact date omitted.
accessed On
2026-09-29

Keep this topic in view

Preserved original record

Earlier public profile and reader notes are preserved separately from the current article. They may contain superseded wording and are not newly checked material.

Read the full original profile

slug

ferritin

name

Ferritin

aliases

iron panel
low ferritin
ferritin women
tired iron

family

numbers

heat

high

talk

Lots of talk

most Discussed

false

first Line

Ferritin is a blood marker used to assess stored iron.

why Line

Fatigue, endurance training or hair concerns often lead people to this result. The discussion becomes useful when ferritin is interpreted with the rest of the clinical picture, rather than treating every low-feeling day as an iron shortage.

feel Words

low iron
ferritin
wrecked runs

common Picture

lead
Keep the report details
why
The value, units and date help make a result usable in a later discussion. [community]
lead
A CBC is a different test
why
People often arrive after a blood-count result and ask what ferritin adds about stored iron. [community]
lead
Follow-up includes the cause
why
Accounts describe discussing why a result is abnormal and arranging treatment and retesting together. [community]

watch For

A clinician interprets the ferritin result alongside symptoms and other findings and decides whether further assessment or treatment is needed.

what People Say

The job: Explain tired, cold, hair-shed anxiety, or a sudden training drop despite a normal complete blood count (CBC). [community]
Why it’s loud: r/xxfitness, r/running, r/anemia — low ferritin stories with normal hemoglobin. [community]
Ferritin is a storage iron marker used in clinical iron workups; interpretation is contextual (inflammation can raise it). [trial]
Reference ranges vs “optimal” internet ranges are a fight — clinicians own the plan. [community]
Men and meat-heavy diets still get iron issues sometimes; women and heavy endurance athletes dominate volume. [community]
Soft performance-podcast mentions of iron status in athletes; still not a self-inject protocol. [community]

how People Run It

Put ferritin on the ask list at the next physical or sports physical. [community]
Same draw as a wider panel when possible (people also want thyroid-stimulating hormone (TSH), vitamin B12 and other tests — clinician chooses). [community]
Bring symptoms: heavy periods, diet pattern, mileage, GI history. [community]
Do not mega-dose iron from a screenshot. [community]
If prescribed iron, follow the plan and retest timing they give. [community]
Training: they may soft-pedal volume while sorting severe fatigue with a clinician. [community]

amounts People Use

This card has no DIY mg target. Doses are clinician territory. [community]
Retest intervals people report: often weeks to a few months on treatment plans — not daily. [community]
Lab add-on cost varies by clinic and country. [community]
“Optimal” forum bands differ from lab reference ranges — treat as talk, not orders. [community]

how People Keep It

Small version: One ask at the next labs. [community]
First week: Write the number. Don’t shop a protocol. [community]
Time / cost: A lab line item. [community]
They track: Number plus how training and energy feel. [community]
It fades when: They buy a bottle off a TikTok range. [community]

how It Feels

Knowing: Relief that there is a number — or relief that iron isn’t the story. [community]
Self-treating badly: GI misery, and worse risks if iron overload is possible. [community]
When treatment is appropriate and supervised: energy stories improve over weeks for some; not magic day two. [community]
Anxiety loop: re-checking every week without a plan. [community]

how Long People Run It

As needed with symptoms or athlete screens, not a monthly hobby lab. [community]
On treatment, follow the clinician’s retest cadence. [community]
Ongoing heavy endurance + heavy periods may mean periodic checks in care plans. [community]

deep Dive

Ferritin is the “stored iron” number people add when tiredness outruns the usual labs: community stories open with “my complete blood count (CBC) was normal but I feel destroyed.” Ferritin can sit low while hemoglobin still looks fine, especially in early iron deficiency — a pattern endurance athletes and menstruating women discuss constantly on r/running and r/xxfitness. Clinicians may interpret it with iron studies, including iron and total iron-binding capacity (TIBC), rather than ferritin alone. Causes (diet, blood loss, absorption, inflammation) and treatment belong with a licensed clinician. [trial]
Why “normal” fights “optimal” online: lab reference ranges can bottom out lower than many sports-medicine and forum “feel human” thresholds people quote. That gap fuels spreadsheet culture and also dangerous self-supplementation. Inflammation, infection, and some chronic conditions can raise ferritin as an acute-phase reactant even when iron is not plentiful in the useful sense — another reason context and clinical reading matter more than a single Reddit screenshot. [trial]
Who floods the threads: distance runners, heavy menstrual bleeding stories, postpartum chapters, plant-forward athletes who never checked iron, and lifters who blame programming for what was recovery chemistry. Men can also develop iron deficiency; the makeup of a forum does not establish its prevalence. Low energy availability and under-fueling can coexist with low iron markers, so nutrition and training load also matter during evaluation. [community]
Self-treatment caution without scare theater: iron tablets upset stomachs, interact with other minerals, and are toxic in overdose — household safety for kids is a real issue. Iron overload disease exists; unopposed supplementation is not a harmless vitamin. IV iron is a medical procedure, not a biohacker flex. Any of those paths start with a person who ordered the right labs and owns the follow-up. [community]
Soft performance culture: coaches and podcasts sometimes mention checking ferritin when an athlete’s times fall off a cliff. That is a reasonable prompt to get care, not a protocol to DM a dose. Function/Superpower-style panels may include iron studies, which still require interpretation in clinical context. Fatigue can prompt discussion of thyroid, hormone or other testing, but the right tests depend on the history; ordering more tests does not necessarily identify the cause. [community]
Training while sorting it: forums advise against hero mileage on severe fatigue while waiting for results, and against blaming character. When a clinician treats documented deficiency, people often report training tolerance returning over weeks, not overnight. Protein and sleep still count; iron is not a caffeine replacement. A normal ferritin does not explain all fatigue or rule out other causes, and poor sleep remains relevant even when iron results are normal. [community]
How to carry a result into a visit: date, units, reference range printed, symptoms list, period blood-loss description if relevant, diet pattern, and supplements already taken. That package beats “I think I’m low.” If the number is high, that is also a clinician puzzle (inflammation, overload, other). Do not celebrate high ferritin as a trophy. [community]
What “ask for ferritin” sounds like in a visit: “I’ve had fatigue and training drop; can we include ferritin and a basic iron panel with this draw?” Then they stop negotiating internet ranges in the room. If the clinician wants broader anemia workup, that is the professional path. If coverage requires documentation, they follow the clinic's process rather than ordering direct-to-consumer tests without a plan for interpretation. [community]
After a treated deficiency, how rooms talk: energy and run quality sometimes return over weeks; stomach side effects from oral iron are common stories; timing away from coffee and calcium is advice clinicians often give. They retest on the schedule they were given, not every Sunday. They do not double dose because a race is coming. Dose and follow-up timing stay with the treating clinician. [community]

watch For Long

Low or high → clinician. Pills are not this card. [community]
TikTok ranges are not prescriptions. [community]
Iron is toxic in overdose — household caution. [community]

related

function-superpower
testosterone-labs
lift-after-40
sleep-hours
hard-cardio-day

research Pointer

play Pointer

—

forums

r/xxfitness
r/running
r/anemia

sources

Ferritin as the missed tiredness lab, especially in women and runners
Ferritin as missed tiredness lab in women and runners
r/xxfitness r/running r/anemia threads
Clinical iron studies context (ferritin, inflammation caveats)

disclaimer

Community talk may be wrong. Not medical or health advice. No result or safety is promised.

quick Answer History

field
communityPicture
rows
- People look into it when discussing tiredness, changes in training or a blood count that did not answer their questions. The notes cover result ranges, units and context, alongside the distinction between asking about iron status and deciding on treatment.
field
firstLine
rows
- A stored-iron number people look up when they are tired, lifting, or running and “labs were normal.”
field
whyLine
rows
- A stored-iron number people add when they are tired and “labs were normal.”
field
commonPicture
rows
- lead
  Ask for ferritin (not only a CBC)
  why
  “Labs were normal” is the opening line. [community]
- lead
  Especially loud for women and runners
  why
  Where the threads live. [community]
- lead
  Write the number + units + date
  why
  Screenshots without context travel badly. [community]
- lead
  Then a clinician for cause and treatment
  why
  Pills are not forum shopping. [community]
- lead
  Retest on a plan, not weekly anxiety
  why
  Iron changes slowly. [community]
- lead
  Training feel + the number together
  why
  Wrecked runs without a story deserve a look. [community]
- lead
  Don’t start random high-dose iron off TikTok
  why
  Stomach and worse are the caution genre. [community]
field
watchFor
rows
- What to do with the number belongs with a clinician. This card is the ask.
field
howPeopleRunIt
rows
- Same draw as a wider panel when possible (people also want TSH, B12, etc. — clinician chooses). [community]
field
whatPeopleSay
rows
- The job: Explain tired, cold, hair-shed anxiety, or a sudden training drop when “CBC was fine.” [community]
field
deepDive
rows
- The tiredness lab people have to ask for: Ferritin is stored iron; a CBC alone misses it in a lot of “labs were normal” stories. Women’s lifting rooms and runners are where the threads live. They ask for ferritin, often with iron and TIBC, then a clinician decides whether food, a pill, or a workup is next. Forum ranges and TikTok protocols are how people self-treat and feel worse. This card is the ask, not a prescription.
- After the number: They write it down next to how training feels. A low number plus wrecked runs is a person and a clinician. A high number is also not a DIY. See Function/Superpower if it arrived in a 100-marker PDF.
- Ferritin is the “stored iron” number people add when tiredness outruns the usual labs: community stories open with “my CBC was normal but I feel destroyed.” Ferritin can sit low while hemoglobin still looks fine, especially in early iron deficiency — a pattern endurance athletes and menstruating women discuss constantly on r/running and r/xxfitness. This card’s job is the ask and the humility: the map is not a pharmacy. Causes (diet, blood loss, absorption, inflammation) and treatment belong with a licensed clinician. [trial]
- Who floods the threads: distance runners, heavy menstrual bleeding stories, postpartum chapters, plant-forward athletes who never checked iron, and lifters who blame programming for what was recovery chemistry. Men are not immune; they just post less. Relative energy deficiency and under-fueling can travel with low iron markers — food cards and training rest matter beside pills. [community]
- Soft performance culture: coaches and podcasts sometimes mention checking ferritin when an athlete’s times fall off a cliff. That is a reasonable prompt to get care, not a protocol to DM a dose. Function/Superpower-style panels may include iron studies — still interpreted in context (see Function card). Testosterone labs and thyroid labs are sibling “numbers” people stack when the complaint is fatigue; more labs are not always more answers. [community]
- Training while sorting it: forums advise against hero mileage on severe fatigue while waiting for results, and against blaming character. When a clinician treats documented deficiency, people often report training tolerance returning over weeks, not overnight. Protein and sleep still count; iron is not a caffeine replacement. [community]
- Related map neighbors: Function/Superpower for panel culture, Lift after 40 and training cards for the “why am I wrecked” arc, Sleep hours when nights are the real culprit. Improving vibe: get the right question on the requisition, then let care handle the answer. A normal ferritin with wrecked sleep still means sleep work. A low ferritin with heroic mileage means care plus training patience. [community]
- What “ask for ferritin” sounds like in a visit: “I’ve had fatigue and training drop; can we include ferritin and a basic iron panel with this draw?” Then they stop negotiating internet ranges in the room. If the clinician wants broader anemia workup, that is the professional path. If insurance needs a diagnosis code dance, they follow the clinic’s process rather than ordering random DTC iron blindly. [community]
- After a treated deficiency, how rooms talk: energy and run quality sometimes return over weeks; stomach side effects from oral iron are common stories; timing away from coffee and calcium is advice clinicians often give. They retest on the schedule they were given, not every Sunday. They do not double dose because a race is coming. Patience is part of the protocol that is not this map’s to write. [community]

Read the preserved reader notes

definition

Ferritin is a blood marker used to assess stored iron.

community Picture

additions

guide

what

The moving part is ferritin in the blood, the protein that holds stored iron. MedlinePlus says the test shows whether iron stores are low or high. Iron is required to make healthy red blood cells, which carry oxygen. The test is usually one piece of an iron workup, not a score for every tired afternoon.
A blood count asks a different question. MedlinePlus says ferritin may be added when hematocrit or hemoglobin is low, and also when there are symptoms of too little or too much iron. Low-iron symptoms on that page include fatigue, weakness, shortness of breath, dizziness, pale skin, and restless legs. Storage can be the issue before someone calls the problem anemia. The page also says a result outside the lab's range does not always mean a condition that needs treatment, and that some medicines move the level.
Inflammation is the mix-up. The same page lists inflammation, including infection or surgery, autoimmune disease, liver disease, cancer, obesity, alcohol use disorder, and hyperthyroidism among reasons ferritin can be high. A high number is not automatically a full tank of useful iron. A low number may mean iron deficiency anemia or another low-iron state. The World Health Organization's ferritin brochure uses cut-offs for deficiency and overload risk. A lab report prints its own reference interval. Those are different lines.

how

Name ferritin at the next visit if the story includes fatigue, heavy menstrual bleeding, a limited diet, heavy endurance training, pregnancy, or poor absorption. MedlinePlus lists heavy menstrual bleeding, pregnancy, being underweight, and poor absorption, including inflammatory bowel disease or gastrointestinal surgery, as reasons low iron may be checked even before symptoms are loud. The clinician chooses what else is drawn. Thyroid or B12 requests stay on that person's list rather than on a fixed panel.
The sample is blood from a vein and usually takes less than five minutes. The page says the provider may ask for a 12-hour fast and that the test is often done in the morning. Confirm the fast on the lab sheet. Keep the value, the units, the date, and the reference interval printed beside the result. Bring symptoms in plain words: cycle flow, mileage, diet pattern, gut history. Do not start a high-dose iron pill from a screenshot. The page says too little or too much iron can cause serious problems if it is not treated.
If iron is prescribed, follow that plan, including the retest timing they give. MedlinePlus says ferritin may be used during treatment to see whether the plan is working. It does not publish a home milligram schedule or a daily recheck. Training changes during severe fatigue belong in the same visit, not in a new program built from the PDF alone.
A normal pass is one morning draw, the report saved, and a person who can see symptoms and the other labs together. Repeating the test every week without a plan does not make the number clearer.

understand

The WHO brochure is the cut-off table this guide can cite. For apparently healthy adults ages 20 to 59, iron deficiency is ferritin under 15 micrograms per liter. With infection or inflammation, the adult deficiency line on that table is under 70. Overload risk in apparently healthy adults is above 150 for females and above 200 for males. Above 500 in non-healthy individuals is marked as a level that needs further clinical and laboratory evaluation. A footnote says that level may mean iron overload or other disease. The brochure says inflammation markers should be assessed with ferritin, and it lists pregnant women only as under 15 in the first trimester. Apparently healthy, there, means well for age and status, without detectable disease.
The lab's printed interval can still call a result normal or abnormal on a different line. MedlinePlus does not publish one national range, so none is copied here. A forum band labeled optimal is a third kind of number, and it is not an order. WHO's lines are about deficiency and overload risk. They are not a sports target and not a dose.
This is the wrong tool as a weekly self-check or as permission to take large amounts of iron. Overload sits on the same pages as deficiency. Hair shedding, a bad training week, or a normal blood count can be unrelated to the ferritin result. The clinician reads the set, including why the number is high or low. Community notes collect the normal-blood-count stories and the loop of retesting without a plan.

sources

self-guide-ferritin-medlineplus — Ferritin Blood Test
self-guide-ferritin-who-brochure — New thresholds for the use of ferritin concentrations to assess iron status in individuals and populations

Download original public profile Download complete article

End of Ferritin