It’s now easier than ever to be diagnosed with low iron levels, but ironically, this is a good thing. The American Society of Hematology (ASH) has updated its guidelines for diagnosing iron deficiency, with the goal of identifying cases that may previously have been overlooked. The biggest change is that the recommended ferritin thresholds used to diagnose iron deficiency are now higher. For some people, this could mean a blood test that was previously considered within an acceptable range may deserve a second look.
What Changed?
Previously, there was considerable variation in the ferritin* levels used to diagnose iron deficiency. ASH’s new guidelines provide clearer thresholds and recommend diagnosing iron deficiency at higher ferritin levels than were often used in the past.
* What is ferritin? Ferritin is a protein that stores iron in the body, and a ferritin blood test is commonly used to help determine whether your iron stores are running low.
For most adults, including menstruating and pregnant individuals, a ferritin level of 30 ng/mL or lower is now considered consistent with iron deficiency, whereas previously the level was frequently considered to be around 15 ng/mL.
The guidelines also recognize that a higher threshold may be appropriate in certain circumstances:
- Adults: 30 ng/mL or lower
- Menstruating individuals: 30 ng/mL or lower
- Pregnant individuals: 30 ng/mL or lower
- People with specific risk factors: a threshold of up to 50 ng/mL may be appropriate
- People with heavy menstrual bleeding: up to 50 ng/mL may be used
- Pregnant individuals with anemia: up to 50 ng/mL may be appropriate
- Adults with inflammation: doctors may consider ferritin below 100 ng/mL or transferrin saturation below 20%, because inflammation can make ferritin more difficult to interpret
That does not mean everyone with a ferritin level of 30 or 40 needs to start taking iron. It does mean that some people who were previously told their iron stores were fine may now have a reason to speak with their doctor again.
Why Did The Threshold Change?
Because low iron can start causing problems before it turns into anemia.
For years, some people were told their iron levels were “fine” even though their iron stores were already getting low. That meant symptoms like tiredness, weakness, dizziness, or trouble concentrating could be easy to overlook.
The new guidelines are designed to catch iron deficiency earlier.
That’s important because low iron and iron-deficiency anemia are not the same thing. Your iron stores can start running low first. If they keep dropping, they can eventually affect hemoglobin and lead to anemia.
So, in simple terms, the new threshold gives doctors a chance to spot low iron sooner instead of waiting until it becomes more severe.
Could Low Iron Be Affecting How You Feel?
Low iron does not always announce itself clearly. Some people may notice fatigue, weakness, headaches, dizziness, shortness of breath, trouble concentrating, a fast heartbeat, or pale skin. Others may have only mild symptoms or none that immediately stand out.
Because these symptoms can have many different causes, they do not automatically mean your iron is low. But if you have been feeling unusually tired, have risk factors for iron deficiency, or were previously told your iron was “a little low,” it may be worth bringing it up with your doctor.
And if you have had your ferritin tested before, now could be a good time to look at that number again in light of the updated guidelines. If your ferritin level was previously described as normal but was somewhere around 30 ng/mL or below, ASH’s updated criteria could change how that result is interpreted.
Likewise, if your level was between 30 and 50 ng/mL and you have symptoms or risk factors such as heavy menstrual bleeding, your doctor may want to consider the bigger picture rather than looking at the laboratory range alone.
Risk factors for low iron can include pregnancy, menstruation, heavy menstrual bleeding, gastrointestinal conditions, blood loss, dietary restrictions, and certain chronic health conditions.
This does not mean you should diagnose yourself from an old lab report. Ferritin can also be affected by inflammation and other health conditions, so your doctor may need additional blood tests to understand what is happening.
Should You Start Taking Iron?
That is a conversation to have with your healthcare provider.
Iron is an essential nutrient, but taking more when you do not need it is not necessarily better. Your doctor can look at your ferritin, hemoglobin, transferrin saturation, symptoms, health history, and possible causes of iron loss before recommending the right approach.
This matters because addressing low iron is not only about replacing iron. It is also important to understand why your iron became low in the first place.
For some people, changes to diet may be sufficient. Others may be advised to take an oral iron supplement. More significant deficiencies or certain medical circumstances may require a different approach.
ASH is currently developing separate treatment guidelines for iron deficiency, so the new diagnostic thresholds should not be interpreted as a universal recommendation that everyone who falls below them should take the same amount of iron.
If Your Doctor Recommends An Iron Supplement, The Form Matters
If your doctor recommends an iron supplement, it is worth knowing that not all forms of iron are the same.
Some are harder on the stomach, while others may be easier to tolerate and absorb. That can make a big difference, especially if you are taking iron regularly. One form that has received attention is iron bisglycinate, which is often chosen because it is designed to be well absorbed while being gentler on the digestive system than some traditional forms of iron. So when choosing an iron supplement, it is worth looking beyond the number on the front of the bottle and checking which form of iron it actually contains.
A Smarter Approach To Iron Support
This is exactly why we formulated Anemiaprin™ with more than just a basic source of iron.
Each daily serving provides 15 mg of iron as Iron Bisglycinate Chelate, the well-absorbed, stomach-friendly form we discussed above. But iron does not work in isolation, which is why the formula also includes nutrients that support how your body absorbs and uses it.
Vitamin C helps improve iron absorption, while Vitamin A as Beta Carotene also plays a role in supporting normal iron metabolism and utilization. Vitamin B12 and Folate help support normal red blood cell formation.
The result is a more complete approach to iron supplementation, one that considers not only how much iron you are getting, but also the form it comes in and the nutrients that help your body make use of it.
Anemiaprin™ is also vegan-friendly, third-party tested, and made in the USA in a cGMP-certified facility.
Could The New Guidelines Apply To You?
Sometimes a change in the guidelines can change the conversation you need to have about your health. If you’ve ever been told your iron was “a little low” or “on the lower end of normal,” now is a good time to revisit that conversation.
The new guidelines do not mean everyone needs an iron supplement. What they do mean is that some people whose iron stores were previously considered adequate may now meet updated criteria for iron deficiency.
So pull up your previous bloodwork if you have it. Look for your ferritin level. Then take that number to your doctor and ask whether the new guidelines change anything for you. If your healthcare provider recommends supplemental iron, Anemiaprin™ is a gentle-on-the-stomach formula worth considering.
Sources
- American Society of Hematology. ASH Sets New Standards for Diagnosing Iron Deficiency, September 16, 2026.
- American Society of Hematology. 2026 Guidelines on Diagnosis of Iron Deficiency: Visual Summary.
- National Institutes of Health, Office of Dietary Supplements. Iron: Health Professional Fact Sheet.
- National Institutes of Health, Office of Dietary Supplements. Iron: Fact Sheet for Consumers.
- Fischer JAJ, et al. The effects of oral ferrous bisglycinate supplementation on hemoglobin and ferritin concentrations in adults and children: a systematic review and meta-analysis of randomized controlled trials.