You are exhausted. Not "long week" tired, but bone-deep, need-a-nap-by-2-p.m. tired. You mention it to your doctor, your bloodwork comes back "normal," and you are told it is stress, age, or being a busy woman.
I hear this story in my practice almost every week. And one of the most common missing pieces is surprisingly simple: heavy periods quietly draining your iron, month after month. The bleeding, the low iron, and the exhaustion are often treated as three separate problems. They are usually one.
What counts as a heavy period?
Many women have had heavy periods for so long that they think it is normal. It is common, but it is not something you have to accept. Your period may be heavy if you:
Soak through a pad or tampon every 1 to 2 hours for several hours in a row
Need to double up on protection or change it overnight
Pass clots larger than a quarter
Bleed for more than 7 days
Plan your day around bathroom access or worry about leaking through clothes
Heavy bleeding often shows up or gets worse in perimenopause, when shifting hormones can make periods longer, heavier, and less predictable.
How heavy bleeding drains your iron
Every period carries iron out of your body. When bleeding is heavy, you can lose more iron each month than you absorb from food. Your body covers the gap by pulling from its storage, a protein called ferritin.
This happens in stages:
Stores run low. Ferritin drops, but hemoglobin is still normal. You may already feel tired, foggy, and short on energy.
Iron-deficient but not anemic. Your body starts rationing iron. Symptoms build, but a standard blood count still looks fine.
Iron-deficiency anemia. Hemoglobin finally drops. By this point, stores have often been empty for months.
The key point is that you can feel the effects of low iron long before you are anemic. If only your hemoglobin is checked, the problem can be missed for years.
It is not just fatigue
Iron does far more than make red blood cells. It fuels your thyroid, your brain chemistry, your muscles, and your energy production. When it runs low, symptoms can show up almost anywhere:
Exhaustion that sleep does not fix
Brain fog and trouble concentrating
Hair shedding or thinning
Restless legs, especially at night
Feeling winded on stairs or during workouts
Cold hands and feet
Headaches, dizziness, or a racing heart
Low mood, anxiety, or feeling easily overwhelmed
Cravings for ice or other non-food items
Many women are treated separately for the hair loss, the anxiety, and the poor sleep, when the common thread is iron.
Why nobody connects the dots
Only hemoglobin gets checked. A normal blood count does not rule out low iron stores.
Ferritin is never ordered, or the range is too wide. Many labs flag ferritin as low only below about 10 to 15 ng/mL. Plenty of women feel unwell well above that number.
Heavy periods are normalized. Women are rarely asked how heavy their periods are, and many never think to mention it.
Inflammation hides it. Ferritin rises with inflammation, so a "normal" result can mask true deficiency.
Care is split up. The gynecologist sees the bleeding, the primary care provider sees the fatigue, and the dermatologist sees the hair loss. No one looks at the whole picture.
A functional medicine approach: fix the leak, then refill the tank
Taking iron without addressing the bleeding is like filling a bucket with a hole in it. In my practice, we work on both at the same time.
1. Find out why you are bleeding heavily. Common drivers include perimenopausal hormone shifts, low progesterone, fibroids, polyps, thyroid imbalance, and insulin resistance. Once we know the cause, there are many options, from hormone support to working alongside your gynecologist on medical treatments.
2. Rebuild your iron the right way.
Choose a gentle form such as iron bisglycinate, which tends to cause less stomach upset and constipation.
Take it every other day rather than daily. Research shows this can improve absorption.
Take it with vitamin C, and away from coffee, tea, calcium, and antacids.
Eat iron-rich foods. Red meat, liver, shellfish, and dark poultry contain heme iron, the form your body absorbs best.
Consider IV iron if you cannot tolerate pills, are not absorbing them, or are very depleted.
3. Support absorption. Low stomach acid, celiac disease, gut inflammation, and some medications such as acid blockers can all limit how much iron you take in.
4. Recheck your labs. Ferritin is usually rechecked after about 8 to 12 weeks. Many women do not feel their energy fully return until their ferritin is well above the bottom of the lab range.
Please do not start iron on your own without testing. Too much iron can be harmful, and supplements can hide a problem that needs a proper evaluation.
When to get help
See a provider promptly if you:
Feel dizzy, faint, or short of breath, or notice chest pain or a racing heart
Soak through protection every hour for several hours
Notice bleeding after menopause or between periods
Have low iron without heavy periods, which needs evaluation for other causes such as GI blood loss
You are not just tired
If you have been told your labs are normal but you still do not feel like yourself, it may be time for a closer look. At A Healthier You, we look at the whole picture, including your cycle, your iron stores, your hormones, your thyroid, and your gut, so you can finally get answers and get your energy back.
Book a visit at newhealthpath.com. We see patients in Sarasota, Florida and on the North Shore of Massachusetts, and offer telehealth nationwide.
Sophia Viner, DNP, APRN, FMCP-M Board-Certified Adult Nurse Practitioner and Functional Medicine Certified Specialist
This post is for educational purposes and is not a substitute for individual medical advice.