Do you find yourself constantly tired, even after a full night's sleep, and wondering if your diet might be part of the picture? Low iron is one of the most common nutrient concerns I discuss with clients, particularly women, and it's a topic that comes up again and again in my practice.
Iron plays a central role in carrying oxygen around the body, and when levels run low, tiredness, pale skin, breathlessness and difficulty concentrating are all common experiences. Before going further, it's worth being clear: if you suspect you may be low in iron, the right first step is a blood test through your GP, who can confirm this and rule out any underlying cause. What I can help with, as a registered nutritionist, is making sure your diet is genuinely supporting your iron levels once any clinical picture has been properly assessed.
Haem iron: the most easily absorbed source
Iron in food comes in two forms. Haem iron is found in animal products such as red meat, poultry and fish, and it's absorbed by the body considerably more efficiently than the plant-based form. If you eat meat, including modest amounts of red meat like lean beef or lamb a few times a week, along with poultry and oily fish, is a straightforward way to support your iron intake.
Oily fish deserves a specific mention here, because alongside iron it brings omega-3 fatty acids that support heart health, making it a genuinely useful addition for many of my clients, vegetarian leanings aside.
Recognising the symptoms of low iron is useful too, even though a blood test is the only reliable way to confirm it. Persistent tiredness that doesn't improve with rest, unusually pale skin or inner eyelids, feeling breathless doing things that didn't used to leave you short of breath, headaches, and brittle nails are all patterns I hear described regularly. None of these confirm low iron on their own, since they overlap with plenty of other causes, which is exactly why a proper blood test through your GP matters rather than guessing from symptoms alone.
Non-haem iron: building it into a plant-forward diet
Given how many of my clients eat a largely vegetarian or plant-based diet, non-haem iron is where most of the practical conversation happens. Plant sources of iron are absorbed less efficiently than animal sources, but that doesn't mean they can't meaningfully contribute, particularly when combined thoughtfully.
- Lentils, chickpeas and other pulses, a staple in many South Asian and vegetarian diets
- Dark leafy greens such as spinach, kale and broccoli
- Tofu and tempeh
- Fortified breakfast cereals, which are often a genuinely useful and underrated source
- Pumpkin seeds, cashews and other nuts and seeds
- Dried fruit such as apricots and raisins, in sensible portions
The key with non-haem iron is variety and consistency, building these foods into meals regularly rather than relying on one big iron-rich dish occasionally.
Getting the absorption right
How you combine foods matters almost as much as which foods you choose. Vitamin C significantly boosts the absorption of non-haem iron, so pairing an iron-rich meal with something like citrus fruit, peppers, tomatoes or a squeeze of lemon juice over your lentils can make a genuine difference. A glass of orange juice alongside a fortified cereal, or peppers stirred through a dal, are simple examples I suggest often.
On the other side, tea and coffee contain compounds called tannins that can significantly reduce iron absorption if drunk too close to meals. I generally recommend leaving a gap of an hour either side of your main meals before having tea or coffee, particularly if you're specifically trying to improve your iron intake. Calcium-rich foods and supplements can have a similar, though smaller, effect, so it's worth not taking a calcium supplement at exactly the same time as an iron-rich meal.
Cooking method can play a small supporting role too. Cooking in a cast iron pan, particularly for acidic dishes like a tomato-based curry or sauce, can increase the iron content of the food slightly. It's not a substitute for the strategies above, but it's a nice, low-effort habit if you already cook that way.
Who is most at risk of low iron
Certain groups are more likely to run low on iron, and it's useful to know if you fall into one of these categories so you can be a little more attentive to your intake.
- Women with heavier periods, who lose more iron through menstrual blood loss each cycle
- Vegetarians and vegans, given the lower absorption rate of plant-based iron
- Pregnant women, whose iron needs increase substantially to support the growing baby
- Endurance athletes and runners, who can lose iron through sweat and increased red blood cell turnover
- Children and teenagers during growth spurts, when iron demands rise quickly
If you recognise yourself in this list and have symptoms like persistent fatigue, pale skin, or breathlessness on exertion, please do speak to your GP about a blood test rather than self-diagnosing or starting a high-dose iron supplement on your own. Iron supplements taken unnecessarily, or at the wrong dose, can cause side effects and aren't something I would ever recommend without proper clinical guidance.
Fussy eating in young children is another situation where iron often comes up in my consultations. If a child is avoiding meat, or eating a fairly narrow range of foods generally, it's worth building in iron-rich options they will actually accept, whether that's a fortified cereal at breakfast, scrambled egg, or lentils blended into a familiar sauce. Vitamin C alongside these meals, such as a small glass of diluted juice or some chopped pepper, helps here too. If you're concerned about a child's iron intake specifically, it's worth flagging at their next GP or health visitor check rather than adjusting their diet drastically on your own.
Bringing it together in everyday meals
In practice, supporting healthy iron levels through food is less about any single "superfood" and more about consistent habits: a varied diet with regular iron sources, smart pairing with vitamin C, and mindful timing around tea and coffee. This kind of practical, personalised approach is exactly what I work through with clients, especially where iron needs intersect with other goals such as children's nutrition during growth, or supporting energy levels during menopause nutrition.
If you would like personalised support with iron-rich eating, I offer one-to-one online consultations. View my consultation packages or book a free discovery call to discuss how I can help.