First, the part everybody skips
You cannot tell whether you’re iron deficient from how you feel. Tiredness, breathlessness on the stairs, cold hands, brain fog, hair thinning, restless legs — all of these can be low iron, and all of them can be a dozen other things, including a thyroid problem, sleep apnoea, depression, or simply not sleeping enough.
What settles it is a ferritin test, usually alongside a full blood count. It’s one blood draw. Your own doctor can order it, or we can run it here.
This matters more than the tablets-versus-infusion question, because giving iron to someone who doesn’t need it isn’t harmless. Too much iron is genuinely dangerous, and that’s the reason we won’t infuse anyone without a recent result in front of us — however tired they feel, and however willing they are to pay.
What iron tablets actually do
You swallow a tablet, it dissolves in your stomach, and a portion of the iron is absorbed through the lining of your small intestine. Most of it isn’t. Absorption varies enormously between people, and it’s affected by what else is in your gut at the time — calcium, tea and coffee, certain medications and antacids all reduce it.
For most people this is fine. The tablets are cheap, they work over a few months, and the story ends there.
Where they fall down:
- They upset a lot of people. Nausea, constipation, stomach cramps and black stools are common, and plenty of people quietly stop taking them.
- Absorption problems. Coeliac disease, inflammatory bowel disease, gastric surgery and long-term acid-reducing medication all cut how much iron gets through.
- They’re slow. Rebuilding stores takes months of consistent daily dosing.
- Ongoing losses. If you’re losing iron faster than you can absorb it — heavy periods being the most common reason — tablets can struggle to keep up.
What an infusion does differently
An infusion puts iron directly into a vein, so the gut is out of the equation entirely. That’s the whole mechanism, and it’s why the tablets’ three main failure modes — poor absorption, intolerance, and slow replacement — mostly don’t apply.
What it looks like in practice at our clinic: a consultation, a ferritin and full blood count, then Dr. Desai reviews the results and prescribes. If it’s appropriate, you have a 30- to 60-minute infusion with a nurse in the room throughout and half an hour of observation afterwards. We use iron sucrose, which is given as a series rather than one large dose — most people need three to five sessions. Repeat labs six to eight weeks later show where you’ve landed.
So which one do I need?
| Iron tablets | Iron infusion | |
|---|---|---|
| Route | Through the gut | Straight into a vein |
| Who it suits | Most people with mild to moderate deficiency | Tablets failed, not tolerated, poor absorption, or levels too low to wait |
| Speed | Months | Most people notice a difference in one to two weeks; stores rebuild over the series |
| Common side effects | Nausea, constipation, cramps, black stools | Metallic taste, flushing, headache, aches — usually mild and short-lived |
| Cost | A few dollars a month | $450 an infusion, $1,195 for a series of three, plus labs |
| Needs a blood test first | Yes | Yes — and a recent one, within 90 days |
The honest summary: if tablets will work for you, take the tablets. They’re a fraction of the cost. Come to us when they haven’t.
Why do infusions cost so much more?
Because they’re a different kind of thing. You’re paying for the product, a physician’s prescription, a nurse’s time for an hour and a half including observation, and a clinical setting equipped for the rare occasions something goes wrong. Tablets are a box on a shelf.
Who shouldn’t have an infusion?
Anyone without lab-confirmed deficiency. Beyond that: people with iron overload, active infection, certain anaemias that aren’t caused by iron deficiency, and some medical histories. Pregnancy is not a bar — iron deficiency in pregnancy is common and is treated, including intravenously — but that decision belongs with whoever is looking after your pregnancy, working with us if they choose to.
What we’d actually tell you at the desk
If you’re tired and you haven’t been tested: get tested. That’s the whole advice, and it costs a fraction of anything else on this page.
If you’ve been tested, you’re deficient, and you haven’t tried tablets: try tablets.
If you’ve tried tablets and they didn’t work, or you couldn’t take them, or your levels are low enough that months of waiting isn’t sensible — that’s when an infusion earns its cost. Bring your results, or we’ll run them here.
Questions
How do I know if my iron is low? A ferritin test with a full blood count. Nothing you can feel, and nothing on this page, is a substitute. Your own doctor can order it, or we can draw it here — either is fine, and results from the last 90 days are what we need.
Can I just take a supplement to be safe? Please don’t. Iron overload is a real condition with real consequences, and taking iron you don’t need is how people get there. Test first.
Will an infusion fix my tiredness? If low iron is causing it, most people notice more energy within a week or two. If something else is causing it, no amount of iron helps — which is why the test comes first and why we’d rather find out than sell you a series.
How many infusions will I need? Usually three to five with iron sucrose, spaced according to Dr. Desai’s order, then repeat labs at six to eight weeks. Some people need fewer, some more, and the labs tell us rather than a schedule.
Does insurance cover it? We’re cash-pay and we don’t file insurance. We’ll give you a superbill — an itemised receipt with the diagnosis and procedure codes — that you can submit to your own insurer to request reimbursement. Whether they pay is between you and them.
Is the infusion itself unpleasant? Usually not. Some people get a metallic taste, flushing, a headache or aches that settle within a day or two. A nurse stays with you and watches you for half an hour afterwards. Tell your nurse straight away if the IV site stings — that one matters, because leaked iron can stain the skin.
I’m an athlete and my performance is falling off. Could this be it? It could, and low iron is common in endurance athletes and in women who train hard. It’s worth a ferritin test before you change your training. See Performance — but the test comes first there too.