Tiredness around your period can have several causes, but low iron may be one of them, particularly if your periods are heavy or prolonged. Menstrual bleeding causes additional iron loss, so regularly including iron-rich foods throughout your cycle can help maintain iron stores.
Iron loss during menstruation and your daily needs
The UK Reference Nutrient Intake for iron is 14.8mg if you are aged 19 to 49. Heavy or prolonged periods can increase iron losses and for some, make it more difficult to maintain adequate iron stores. Over time, continued iron loss can reduce your iron stores and may eventually lead to iron-deficiency anaemia. Aiming to include iron-rich foods regularly throughout your diet can help prevent this. If you experience persistent fatigue, breathlessness, palpitations or other possible symptoms of iron deficiency, speak to your GP about appropriate blood tests and whether dietary changes or iron supplementation may be needed.2
Haem and non-haem iron: the difference and why it matters
Food gives you iron in two forms. Haem iron comes from animal products, and your body takes it in fairly easily. Non-haem iron comes predominantly from plants, and your body absorbs less of it, though there are simple ways to help that along. Knowing the difference makes it easier to plan meals that work harder for you throughout your cycle.3
Good sources of haem iron
Red meat like beef and lamb provide a good source of haem iron. Liver is especially rich in it. Poultry, fish and some seafood also provide haem iron. If you eat meat, working these into your meals day to day can help to maintain your iron stores.4
Plant-based iron sources for non-haem iron
If you eat vegetarian or vegan, or you just want more of your iron from plants, you have plenty to work with. Beans, lentils, and chickpeas are easy everyday sources. Nuts, dried apricots, and tofu all add non-haem iron too. Fortified breakfast cereals can help, as can dark green leafy vegetables like broccoli and kale. Including a variety of these foods regularly can help you meet your iron needs each day.5
Pairing vitamin C with non-haem iron foods
Since your body absorbs less non-haem iron, what you eat with it can make a real difference. Vitamin C can help your body absorb more of it. So at the same meal, you might add oranges, lemons, kiwi, tomatoes, or peppers next to your plant-based iron. Think lentil soup with a squeeze of lemon and some tomatoes, or a chickpea salad with a citrus dressing.6
What can reduce iron absorption
The polyphenols in tea and coffee, as well as phytates naturally found in foods such as legumes, wholegrains and some nuts and seeds, can reduce the absorption of non-haem iron. With this in mind enjoying your hot drinks away from your iron containing meals can be beneficial. Additionally, preparation methods such as soaking dried legumes, sprouting seeds or grains and fermentation (for example, sourdough bread) could help to reduce phytate levels and improve iron availability.7
Putting it together: practical meal ideas
You do not need to overhaul how you eat. A few small tweaks can support your iron levels without much effort. Some starting points:
- A bowl of fortified breakfast cereal with a small glass of orange juice instead of tea first thing.
- A lentil or chickpea-based lunch with tomatoes or a citrus dressing to help absorption.
- A beef or lamb dinner with a side of dark leafy greens, and holding off on your post-dinner tea for an hour.
- A small handful of nuts and dried apricots in the afternoon.
These are general suggestions, and your needs vary. If you are worried about your iron levels, or your periods are regularly heavy, a chat with your GP or a registered dietitian can give you guidance that fits you.