Iron Infusion for Heavy Periods — Cardiff
You're losing iron faster than you can replace it. Every month, heavy periods drain your stores a little further — and iron tablets can't keep up. If exhaustion has become your normal, there's a reason for it. And there's a way to break the cycle.
What is iron deficiency from heavy periods?
Heavy menstrual bleeding — clinically known as menorrhagia — is one of the most common causes of iron deficiency in women of reproductive age. Every period involves blood loss, and blood contains iron. When that blood loss is heavier than normal, iron leaves the body faster than diet or supplements can replace it.
In the UK, around 1 in 5 women of reproductive age are affected by iron deficiency, and heavy periods are the leading cause. The condition is remarkably common — yet many women live with the symptoms for years without connecting them to their periods or getting their iron levels checked.
What makes this particularly frustrating is how gradual it can be. Iron stores don't crash overnight. They deplete slowly, cycle after cycle — so the tiredness creeps in and starts to feel normal. By the time you realise something is wrong, your ferritin may have been low for months or even years.
Heavy periods can be caused by fibroids, endometriosis, adenomyosis, hormonal imbalances, or sometimes have no identifiable structural cause. Whatever the underlying reason, if you're losing significant iron each month, the deficiency needs treating — ideally alongside managing the periods themselves.
Symptoms of iron deficiency from heavy periods
These symptoms often build gradually over months — making them easy to dismiss as stress, ageing, or "just being tired." If several feel familiar, your iron levels are worth checking.
Why heavy periods drain your iron — and why tablets often fail
The maths is simple, and it's not in your favour. A typical period loses around 30–40ml of blood. Heavy periods can mean losing 80ml or more — sometimes significantly more. Each millilitre of blood contains roughly 0.5mg of iron.
That means a heavy period can cost you 40mg or more of iron in a single cycle. Meanwhile, oral iron supplements — even when tolerated — deliver only around 6–10mg of absorbed iron per day. If you're losing 40mg+ each month and absorbing 6–10mg per day, the gap is clear. You're depleting faster than you can replenish.
Add to that the well-known side effects of iron tablets — constipation, nausea, stomach cramps, dark stools — and many women reduce their dose or stop taking them altogether. The result is a cycle of depletion that tablets simply cannot break.
IV iron changes the equation. A single infusion can deliver up to 1000mg of iron directly into the bloodstream — equivalent to months of oral supplementation — in a single 30-minute session. It doesn't depend on gut absorption, so it works even when tablets don't.
40mg+
of iron lost per heavy period
Tablets absorb 6–10mg per day. The maths doesn't work — and your body knows it.
1 in 5 women of reproductive age in the UK are iron deficient. Heavy periods are the most common cause.
Treatment options for iron deficiency with heavy periods
Dietary iron
Iron-rich foods — red meat, spinach, lentils, fortified cereals — support overall iron intake. But when you're losing significant iron each month through heavy bleeding, dietary sources alone cannot keep up with the deficit.
Supportive — but won't close the gap alone.
Oral iron supplements
Standard first-line treatment. Can help if your periods are moderately heavy and your deficiency is mild. However, many women find the side effects — constipation, nausea, stomach pain — difficult to tolerate long-term. And absorption is limited to around 6–10mg per day.
Works for some — but often can't outpace monthly losses.
IV iron infusion
Delivers up to 1000mg of iron in a single 30-minute session, bypassing the gut entirely. No nausea, no constipation. Particularly effective when monthly blood loss exceeds what oral supplements can replace — which is exactly the pattern with heavy periods.
Breaks the cycle when tablets can't keep up.
How IronOx Clinic helps with heavy periods and iron deficiency
We understand the pattern
Heavy periods and iron deficiency go hand in hand — but they're often treated in isolation. We look at the full picture: your symptoms, your cycle, your bloods, and your history. Dr Ros assesses whether IV iron is right for you and discusses long-term management.
Fast, effective treatment
A single iron infusion delivers up to 1000mg of iron in 30 minutes — what would take months of oral supplementation. Most patients notice a significant difference within 1–2 weeks. No gut side effects, no daily tablet routine.
Coordinated care
After your infusion, your GP receives a full clinical report within 24 hours. If you're also being seen by a gynaecologist for your periods, we ensure your iron treatment is coordinated with your wider care plan.
Ongoing monitoring
Because heavy periods are ongoing, we discuss a monitoring plan to track your iron levels over time. If your stores begin to deplete again, we'll catch it early — before you're back to feeling exhausted.
What our patients say
"Dr Ros is amazing, a very calming, reassuring person and absolutely lovely."
Iron infusion for heavy periods — common questions
If your periods last longer than 7 days, you're soaking through pads or tampons every 1–2 hours, passing clots larger than a 10p coin, or you need to double up on protection — your blood loss may exceed your body's ability to replace iron. A blood test measuring ferritin and haemoglobin will confirm whether you're iron deficient.
Iron tablets can only deliver around 6–10mg of absorbed iron per day. If your monthly blood loss is significant, you're losing iron faster than oral supplements can replace it. It's like trying to fill a bath with a dripping tap while the plug is out. IV iron bypasses this limitation by delivering up to 1000mg in a single session.
Not usually. A single iron infusion can replenish your stores for several months. However, if your heavy periods continue, your iron may gradually deplete again over time. Dr Ros will advise on monitoring and whether ongoing treatment may be needed based on your individual situation.
Ideally, yes — treating the underlying cause of blood loss alongside correcting iron deficiency gives the best long-term outcome. Dr Ros can discuss this with you and coordinate with your GP or gynaecologist if needed. Iron infusion addresses the deficiency; managing the periods addresses the root cause.
Yes. There's no clinical reason to avoid iron infusion during your period. You can attend your appointment at any point in your cycle.
If you experience heavy menstrual bleeding, it's important to have this investigated by your GP or gynaecologist to identify any underlying cause. Iron infusion treats the deficiency — but managing the underlying bleeding is equally important for long-term health.
Stop losing ground every month
If heavy periods have been draining your iron and your energy, one appointment with a specialist could change everything. No referral needed — book online in 2 minutes.
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