Iron deficiency is one of the most common conditions seen at Shire Family Medical, a family-owned GP practice in Sutherland — and one of the most easily overlooked. Many patients put their symptoms down to a busy life, poor sleep, or getting older. But persistent fatigue, pale skin, and difficulty concentrating are all recognisable signs of low iron, and a straightforward blood test can confirm whether iron deficiency is the cause. This guide covers the full range of symptoms to watch for — including some that are less commonly known — and explains when it is time to speak with your GP.
Why Iron Matters in Your Body
Iron is an essential mineral your body uses to produce haemoglobin — the protein in red blood cells responsible for carrying oxygen from your lungs to every cell in your body. Without enough iron, your body cannot make sufficient haemoglobin, and your tissues and organs begin to receive less oxygen than they need to function well.
Your body cannot manufacture iron; it must come from food or supplementation. When intake falls short of demand — through a restricted diet, blood loss, or problems with absorption — iron stores gradually deplete. The result is a range of symptoms that can affect energy, cognition, mood, and physical health, often developing so slowly that they are accepted as normal long before iron deficiency is identified as the cause.
Common Symptoms of Iron Deficiency
Iron deficiency symptoms can range from mild to significant and often develop gradually, which is why many people do not notice them until their levels have been low for some time. The most frequently reported symptoms include:
- Persistent fatigue and low energy — feeling tired even after adequate sleep is one of the most common signs of iron deficiency. Without enough oxygen reaching your muscles and brain, everything takes more effort than it should.
- Shortness of breath — if everyday activities like climbing stairs or walking leave you more breathless than usual, low iron may be a contributing factor.
- Pale or sallow skin — reduced haemoglobin can give the skin, gums, and inner eyelids a washed-out appearance.
- Headaches and dizziness — insufficient oxygen supply to the brain can trigger frequent headaches or light-headedness, particularly when standing quickly.
- Difficulty concentrating — often described as brain fog, this can affect work performance, memory, and the ability to stay focused on tasks.
- Irritability or low mood — iron plays a role in neurotransmitter production, and low levels have been associated with mood changes and irritability.
If you are experiencing several of these symptoms together, it is worth speaking with your GP rather than waiting to see if things resolve on their own. Symptoms that feel vague individually can point clearly to iron deficiency when considered together — and a blood test is the only way to know for certain.
Less Obvious Signs You Might Be Low in Iron
Not all iron deficiency symptoms are as well known as fatigue. Several less obvious signs may be connected to low iron levels, and are worth raising with your GP if they feel familiar.
- Hair loss or increased shedding — iron is needed to support hair follicle function. Noticeable thinning or shedding beyond what is typical for you can be a sign of depleted iron stores.
- Brittle or spoon-shaped nails — nails that crack easily, or that curve inward (a condition called koilonychia), may indicate prolonged iron deficiency.
- Restless legs syndrome — an uncomfortable urge to move the legs at night has been associated with low iron levels in some patients and may improve with iron treatment.
- Heart palpitations — the heart may beat faster to compensate for reduced oxygen in the blood, leading to an awareness of your heartbeat during or after physical activity.
- Cold hands and feet — poor circulation caused by reduced red blood cell activity can leave the extremities feeling persistently cold.
- Pica — unusual cravings for non-food items such as ice, clay, or chalk are a recognised symptom of iron deficiency, particularly in women.
- Frequent infections or slow recovery — iron supports immune function, and prolonged deficiency may increase susceptibility to illness.
These symptoms can occur even when fatigue is not severe — and in some cases, they may be the first indication of low ferritin before full anaemia develops. If you are tired all the time and noticing other changes like hair loss or restless legs, iron deficiency is worth investigating.
Who Is Most at Risk of Iron Deficiency?
Iron deficiency can affect anyone, but certain groups have a significantly higher risk:
- Women with heavy periods — menstrual blood loss is the most common cause of iron deficiency in women of reproductive age. Those with heavy periods may lose significantly more iron each month than the body can readily replace through diet alone.
- Pregnant and breastfeeding women — iron demand increases substantially during pregnancy to support the developing baby, and breastfeeding draws further on maternal iron stores.
- Children and adolescents — rapid growth increases iron requirements, and dietary intake does not always keep pace.
- People following vegetarian or vegan diets — plant-based iron (non-haem iron) is less efficiently absorbed than iron from animal products (haem iron), making adequate intake more challenging.
- People with absorption conditions — coeliac disease, inflammatory bowel disease, and a history of gut surgery can all impair how well iron is absorbed through the digestive tract.
- Frequent blood donors — regular donation can deplete iron stores if they are not actively replenished through diet or supplementation.
Low Ferritin Without Anaemia — A Form of Iron Deficiency That Is Often Missed
Iron deficiency and iron deficiency anaemia are not the same condition. Anaemia occurs when iron levels are so low that haemoglobin production is significantly affected — producing the pale skin, breathlessness, and extreme fatigue most people associate with the term. But non-anaemic iron deficiency — where iron stores (measured by ferritin) are depleted while haemoglobin remains within the normal range — is a distinct condition that causes just as many symptoms, yet is frequently missed on standard blood test panels.
Ferritin is the protein that stores iron in the body. A low ferritin count can cause fatigue, hair loss, poor concentration, restless legs, and mood changes even when a routine full blood count looks normal. This is why it is worth asking your GP specifically about ferritin testing, particularly if your symptoms persist despite being told your blood work is normal.
An iron studies panel — which measures serum ferritin, serum iron, transferrin, and transferrin saturation — provides a complete picture of iron status beyond what a standard full blood count shows. Your GP can interpret these results together and identify deficiency at an earlier stage.
How Iron Deficiency Is Diagnosed
The only reliable way to confirm iron deficiency is through a blood test. On-site pathology collection is available at Shire Family Medical on weekdays, with results sent directly to your GP for review and follow-up.
Your GP will typically request one or more of the following:
- Full blood count (FBC) — checks haemoglobin and red blood cell counts, and is the standard test for identifying anaemia
- Serum ferritin — the most sensitive early indicator of iron deficiency, measuring how much iron is stored in the body
- Iron studies — a broader panel that includes serum iron, transferrin, and transferrin saturation, giving a full picture of iron metabolism
Depending on the results, your GP may also investigate the underlying cause of deficiency — particularly if blood loss is suspected. For women, this may involve reviewing menstrual history; for others, gut investigations may be relevant to rule out conditions affecting absorption or causing internal bleeding.
Treatment Options: From Dietary Changes to Iron Infusions
Dietary Changes and Oral Supplements
For mild to moderate iron deficiency, the first step is usually increasing dietary iron intake and, in many cases, taking an oral iron supplement recommended by your GP. Iron-rich foods include red meat, chicken, fish, legumes, tofu, fortified cereals, and dark leafy greens. Pairing these with vitamin C — adding lemon juice to a meal, for example — can improve iron absorption. Coffee, tea, and calcium-rich foods can reduce absorption when consumed at the same time.
Oral supplements require consistent use over several months to replenish depleted stores and may cause side effects including nausea, constipation, or stomach discomfort in some people. Your GP can advise on the most suitable form and dose.
When an Iron Infusion May Be the Right Option
For patients who cannot tolerate oral supplements, have severe deficiency, or need iron levels restored more efficiently, an intravenous iron infusion may be the most appropriate course of treatment. Iron infusions at Shire Family Medical are administered on-site by our experienced nursing team, with individual planning and follow-up blood tests to monitor recovery.
An infusion delivers iron directly into the bloodstream, bypassing the digestive system entirely. This makes it effective for patients with absorption difficulties, those who experience side effects from oral iron, and those with significant deficiency where dietary correction alone would take too long. You can read more about iron infusion costs in Australia and what to expect before and after an iron infusion in our related guides.
If you have been experiencing symptoms that may point to low iron, a conversation with your GP is the right starting point. Book an appointment at Shire Family Medical →
Frequently Asked Questions
What are the most common symptoms of iron deficiency?
The most common iron deficiency symptoms are persistent fatigue, pale skin, shortness of breath, headaches, dizziness, difficulty concentrating, and irritability. These occur because low iron reduces the body’s ability to produce haemoglobin, which carries oxygen to tissues and organs. Symptoms often develop gradually and may be mistaken for stress or insufficient sleep before iron deficiency is identified as the cause.
Can you have iron deficiency without anaemia?
Yes. Iron deficiency without anaemia — sometimes called non-anaemic iron deficiency — occurs when ferritin (iron stores) is low but haemoglobin remains within the normal range. This condition causes real symptoms including fatigue, hair loss, restless legs, and poor concentration, but is often missed on a standard blood count. A serum ferritin test is needed to detect it accurately.
What is a ferritin test and when should I ask for one?
A ferritin test is a blood test that measures the amount of stored iron in your body. It is the most sensitive early indicator of iron deficiency and can show depletion before anaemia develops. Ask your GP about ferritin testing if you have ongoing fatigue, hair loss, restless legs, or other low iron symptoms that have not been explained by a standard full blood count result.
Why are women more likely to develop iron deficiency?
Women of reproductive age lose iron through menstrual bleeding each cycle, and those with heavy periods may lose significantly more than the body can replace through diet alone. Pregnancy and breastfeeding also increase iron requirements substantially. For these reasons, iron deficiency is considerably more common in women than in men, though it can affect people of any age or sex.
What are the less obvious signs of low iron?
Less obvious signs of iron deficiency include hair loss or increased shedding, brittle or spoon-shaped nails, restless legs at night, heart palpitations, persistently cold hands and feet, unusual cravings for non-food items such as ice (a condition known as pica), and frequent infections. These symptoms can occur even without significant fatigue and may be the first indication of low ferritin without full anaemia.
When is an iron infusion recommended instead of supplements?
An iron infusion may be recommended when oral iron supplements cause significant side effects, when iron deficiency is severe and needs to be corrected more efficiently than diet allows, or when an underlying condition affects how well iron is absorbed through the gut. Shire Family Medical provides on-site iron infusions administered by the nursing team, with follow-up blood tests to monitor iron levels after treatment.
Can I test for iron deficiency without a GP referral?
In Australia, a GP referral is required for iron blood tests to be covered under Medicare. Your GP will assess your symptoms, request the appropriate tests — which may include a full blood count, serum ferritin, and iron studies — and review the results with you. On-site pathology collection is available at Shire Family Medical, 154 Flora Street, Sutherland NSW 2232, on weekdays.
How long does it take to recover from iron deficiency?
Recovery time depends on the severity of the deficiency and the treatment approach. With consistent use of oral iron supplements, ferritin levels typically begin to improve within a few weeks, but full restoration of iron stores may take three to six months. Iron infusions can replenish stores more efficiently. Your GP will arrange follow-up blood tests to monitor your progress and adjust treatment if needed.
This article provides general health information only. It is not a substitute for personalised medical advice and does not create a doctor-patient relationship. Any treatment, test, procedure or vaccination mentioned is for illustrative purposes only — suitability depends on individual circumstances and assessment by a qualified health professional. Medical information can change; always speak with your GP about your specific symptoms, health history and care options. In an emergency, call 000.
