Ferritin Blood Test: How to Read Your Iron Panel

A ferritin blood test measures the amount of ferritin in your blood. Ferritin is the protein your body uses to store iron, so this reading provides a window into how much iron your body is holding in reserve. Ferritin is one piece of a larger picture. Healthcare providers consider it alongside other bloodwork, your symptoms, medical history, and individual factors before concluding based on the number alone.

Iron Labs Explained: What Each Marker Means 

To get your iron labs explained properly, start with what each marker represents. An iron panel typically includes:

• Serum iron
• Total iron-binding capacity (TIBC)
• Transferrin
• Transferrin saturation
• Ferritin

Serum iron measures the iron actively circulating in your blood. TIBC reflects how much capacity your blood has to bind iron. Ferritin shows you how much is being held in reserve. Looking at them together is what gives the results real context, which is why no single number tells the complete story on its own.

For women especially, low ferritin often surfaces as hair shedding, persistent fatigue, and cold hands before any other marker shifts. This is one reason the full iron panel tells a more complete story than hemoglobin alone, and why ferritin is worth tracking consistently. Lactoferrin, the active ingredient in our formula, binds and transports iron through this same regulation system, which is why we built around it.

How to Read Ferritin Levels on an Iron Panel

Ferritin results come with a laboratory reference range. A reading below that range may signal depleted iron stores. Elevated ferritin can point to several possible causes, which is why the number should always be read alongside the rest of the panel and your health history. A few things worth knowing when you review your results:

• A ferritin reading below the lab reference range may point to low iron stores. For many women, symptoms like hair loss, fatigue, and brain fog appear before the number drops to clinical lows.
• A result within the standard reference range is not always sufficient. A growing body of research now suggests the minimum healthy ferritin level may be roughly double what current labs use to rule out deficiency, which means "normal" does not always mean optimal. This is the gap our formula works in: supporting your levels beyond the bare minimum, not just to "in range."
• Elevated ferritin can result from inflammation, certain health conditions, or other factors unrelated to iron stores.

Your healthcare provider is the right person to interpret your ferritin alongside the full iron panel and your health picture.

How Much Ferritin Should I Have?

There is no single number that applies to everyone, and the cutoffs used to define low ferritin have been shifting. Three major organizations now point to different thresholds for identifying iron deficiency:

• The World Health Organization uses a ferritin of 15 ng/mL or below.
• The American Society of Hematology issued guidance in September 2026, setting the threshold at 30 ng/mL or lower for most adults, with 50 ng/mL or lower appropriate for higher-risk groups, such as people with heavy menstrual bleeding. 
• The American Gastroenterological Association raised its threshold to 45 ng/mL or below in its 2020 guidelines.

The reasoning behind the higher cutoffs is sensitivity: they catch more people with depleted iron stores. According to this report on the new ferritin thresholds, researchers using national survey data estimated that the 30 and 45 ng/mL cutoffs would classify 2.4 and 3.3 million more people in the US as having iron deficiency anemia than the 15 ng/mL cutoff. More than half of the newly identified people were premenopausal women, and most of the women at the 45 ng/mL cutoff had low dietary iron intake. The higher cutoffs also flagged more postmenopausal women and men with risk factors for gastrointestinal blood loss, which could allow earlier follow-up. The researchers cautioned that, for premenopausal women, the AGA's threshold could lead to more endoscopies than necessary.

What this means for you: a result that lands in your lab's normal range may still fall below the higher thresholds some guidelines now use. Bring your number, your symptoms, and your full iron panel to your healthcare provider, and ask which threshold they use to interpret your results.

What Does Transferrin Saturation Mean?

Transferrin is a protein that transports iron through the bloodstream. Transferrin saturation refers to the percentage of available transferrin binding sites that are carrying iron. This measurement can provide additional context about how much iron is available for transport. Healthcare providers may consider transferrin saturation alongside ferritin, serum iron, and TIBC when reviewing iron status.

How to Test Iron Levels at Home

Wondering how to test iron levels at home? Several services offer kits for collecting a blood sample at home and sending it to a certified lab for analysis. The markers included vary by service, so check whether the panel covers ferritin, serum iron, TIBC, and transferrin saturation before choosing.

At-home testing makes access more convenient. The results still need a professional's interpretation. Share your findings with a healthcare provider when anything falls outside the reference range or doesn't match how you're feeling.

How Palisade Supports Healthy Ferritin and Iron Levels

Our Bioidentical Lactoferrin Gummies are designed to support healthy iron and ferritin levels at the gut level.* Each two-gummy serving delivers 100 mg of effera™ bioidentical lactoferrin, 50 mg of AstraGin®, and 2 billion CFU of Bacillus coagulans Unique IS-2®.

These are not conventional iron supplements. Our formula contains no supplemental iron. Lactoferrin works with iron that is already in your body to support iron utilization and transport. Most lactoferrin supplements are sourced from cows. Not ours. Palisade’s bioidentical lactoferrin is made through precision fermentation, making the formula dairy-free, vegan, and cruelty-free. 

In a 2026 published case series, active women with persistently low iron saw increases in both ferritin and serum iron after taking 100 mg per day of effera™, our exact serving dose, with no GI side effects reported (Evans et al., Cureus). A case series is not the same as a randomized controlled trial, and individual results vary. Women managing low iron or receiving treatment for an iron-related condition should work with a healthcare provider on the right approach for them.

Consistency is what moves the needle. Two gummies daily, taken anytime, is all the routine requires. Most women notice smoother digestion by Month 1, iron and ferritin levels beginning to regulate by Month 2, and continued improvement alongside a stronger gut barrier by Month 3.* The full protocol runs 90 or more days. That's when results tend to compound.

What to Do If Your Ferritin Is on the Low End 

If you've been told your ferritin is "normal" while you still feel off, you're not alone, and the guidance has recently changed. In September 2026, the American Society of Hematology (ASH) issued new ferritin thresholds for diagnosing iron deficiency, which are higher than the cutoffs many labs have used for years. Here's how to bring them into your next conversation with your provider.

Step 1: Get Updated Labs

Call or message your doctor and ask for a full iron panel. You can say:

"I saw ASH updated its ferritin thresholds in September. I want to look at my number against the new cutoffs. Can we run a full iron panel, please? Ferritin, serum iron, TIBC, transferrin saturation, and a CBC."

Step 2: Know the New Cutoffs

ASH's updated guidance suggests diagnosing iron deficiency at these ferritin levels:

• 30 ng/mL or lower for most adults, including menstruating and pregnant individuals (previously 15 ng/mL for adults)
• 50 ng/mL or lower may be appropriate if you have symptoms, heavy or abnormal periods, other risk factors, or plans to become pregnant
• Under 100 ng/mL, or transferrin saturation under 20%, for adults with inflammation, such as inflammatory bowel disease (IBD), cancer, or infectious disease

Step 3: Describe Your Symptoms

Be specific about where your number falls and what you're experiencing:

"My ferritin is X, which falls under the new ASH guidelines at ___. I've been experiencing ___."

Common symptoms include:

• Fatigue that sleep doesn't fix
• Brain fog and low mood
• Hair shedding and brittle nails
• Cold hands and feet
• Shortness of breath on stairs or workouts
• Racing or pounding heart
• Dizziness or headaches
• Restless legs at night

Step 4: Tell Them What You Need

Going in with a clear ask makes the visit easier to steer:

"Based on the new guidelines, I'd like three things: for my chart to reflect iron deficiency, a treatment plan, and a retest date. I've had a hard time with iron pills before, so I'd like to talk through options that are easier on my stomach. I'd also like to understand what's causing it."

Step 5: If You're Being Dismissed

Stay calm and keep it about the numbers. A few lines that can help:

"The lab's reference range and the ASH diagnostic cutoff are two different numbers. Mine falls under the cutoff."

"Can you walk me through why the new guidelines don't apply to me?"

"Please note in my chart that I raised this and that we're not following up."

Step 6: When to Ask for a Specialist

Push for a referral if:

• Your ferritin stays low after treatment
• You can't tolerate iron supplements
• Heavy periods are the likely cause (gynecologist)
• There's no clear cause, or you have digestive symptoms (GI)
• Your doctor won't act on the new cutoffs (hematologist)

You can say: "Given my numbers and symptoms, I'd like a referral to a hematologist. If you don't think I need one, please note that in my chart."

This information is general and doesn't replace medical advice. Your healthcare provider can interpret your results in the context of your full health picture.

Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. 

Sources:

1. Evans, C., Peterson, R., Antonio, J., & Clark, A. (2026). Improving Iron Status Without Iron: Clinical Insights From Recombinant Human Lactoferrin Supplementation. Cureus, 18(4), e107451. https://doi.org/10.7759/cureus.107451 
2. U.S. Medicine. "New Ferritin Thresholds Recommended in Guidelines Have Benefits, Disadvantages." U.S. Medicine, 9 Sept. 2026, www.usmedicine.com/clinical-topics/gastroenterology/new-ferritin-thresholds-recommended-in-guidelines-have-benefits-disadvantages/. 
3. American Society of Hematology. "ASH Sets New Standards for Diagnosing Iron Deficiency." American Society of Hematology, 16 Sept. 2026, www.hematology.org/newsroom/press-releases/2026/ash-sets-new-standards-for-diagnosing-iron-deficiency.