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Which iron supplements? How to choose the best one for you

Selection of iron tablets on an orange background
With all the iron supplements out there, how do you choose? Discover the best iron for you, from gentle iron tablets to on-the-go drinks

Our top picks

With vitamin C

Holland & Barrett Gentle Iron 20mg 30 Capsules
4.69

Holland & Barrett

Holland & Barrett Gentle Iron 20mg 30 Capsules

Buy 1 Get 1 Free

£4.35

One a day

Spatone Original Natural Iron Supplement 28 x 20ml Sachets
4.83

Spatone

Spatone Original Natural Iron Supplement 28 x 20ml Sachets

Save up to 1/2 Price

£12.29

£14.99

Quick absorption

Better You Iron Spray 25ml
4.73

BetterYou

Better You Iron Spray 25ml

Save up to 1/2 Price

£8.43

RRP £10.95

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Your doctor’s recommended you increase your iron levels – what next? If you’ve been advised to take iron, your GP or healthcare professional may sometimes prescribe a specific form, such as ferrous fumarate, particularly if your levels are low. In other cases, you might be advised to take an over-the-counter iron supplement. With so many options available, it can feel a little overwhelming.

The good news is there are a variety of iron supplements to suit different needs and preferences. We’ll break down the details, from why iron’s so important to which type could be for you. Then we'll share our top supplement picks, including iron that’s gentle on the stomach, iron gummies, iron multivitamins and more...

What is iron and why do we need it?

Iron is a mineral needed for some essential functions in the body, including transporting oxygen, forming red blood cells and supporting the immune system.1,2,3 And yes, it’s the same metal that pots and pans are made of – just in very tiny amounts...

Low iron levels can make you feel more tired than usual, and maintaining healthy iron levels helps support normal energy and cognitive function.4 A whopping 25% of women and 49% of teenage girls in the UK don’t get enough iron.5 Women and AFAB (assigned female at birth) people are most likely to have low iron because of pregnancy and heavy periods. As are vegetarians and vegans because iron from plant-based sources is slightly less bioavailable (easy for the body to absorb) than iron from animal products.6

It’s best to get as much iron as you can through your diet – you can find it in foods like red meat and liver, beansnutsdried fruit and fortified foods like breakfast cereals.6 However, you might need some help from iron supplements if you don’t eat a lot of these foods or if you’re at higher risk of iron deficiency for another reason, such as if you have heavy periods.6

Which type of iron should I choose?

If your doctor’s recommended you take an iron supplement, the next step is to choose one. There are plenty of types to choose from and it just depends on what you find most convenient:
  • tablets and capsules: the old faithful, iron tablets are a convenient option and are easy to take on the go. However, you’ll need to take them with water and some people might find tablets difficult to swallow
  • gummies: iron gummies are a fun and easy way to get your intake, as they often come in fruity flavours. They’re a great option if you need a little extra motivation or you find swallowing pills difficult. However, gummies often contain added sugars or sweeteners and their dosages may not be as high as other forms of iron – so check the label to make sure they suit you
  • liquid iron: you can buy iron in pre-measured liquid sachets, making it easy to get a dose on the go and without water. However, they can be a more expensive option and, like gummies, may contain extra ingredients and have lower dosages than iron tablets. If these are your pick, check the label to find a liquid that works for you
  • iron spray: also ideal if you don’t take tablets – simply spray onto the tongue. However, iron sprays often provide very low doses so they shouldn’t be relied on as your main source of supplementary iron
Some people find certain forms of iron harder on their digestion than others – you can look out for ‘gentle iron’ options which some people find easier to take.

Our best iron supplement picks

Whether you’re debating gummies vs liquid iron, something that’s gentle on the stomach or a fun flavour, we’ve gathered a few of our top iron supplements below:
Holland & Barrett Gentle Iron 20mg 30 Capsules

With vitamin C

Holland & Barrett

£4.35

£0.15/1 Capsule

Gentle on the stomach

The iron you’re looking for – just without the gut discomfort. Our vegan Gentle Iron tablets use iron bisglycinate, a highly bioavailable (easy to absorb) form that’s gentle on the stomach. The 20mg dose provides your full daily iron intake, needed for transporting oxygen around the body and contributing to the reduction of tiredness and fatigue.1,7 They also contain 100mg vitamin C, which increases iron absorption for a perfectly-suited pair.
 
Floradix Liquid Iron Formula 250ml

Added energy support

Floradix

£15.49

£6.20/100 ml

Easy-to-take liquid iron

Want an iron supplement to suit the whole family? Floradix’s liquid formula means it’s easy to measure out based on your individual needs. As well as organic iron from ferrous gluconate, it contains vitamin C for increased iron absorption and vitamins B2B6 and B12 to contribute to normal energy-yielding metabolism and help reduce tiredness and fatigue.8-15 This liquid formulation provides fast absorption and is suitable for all ages over three years and for use during pregnancy. Shake the bottle well before use and use the cap to measure out your required dosage (shown on pack), then take on an empty stomach approximately 30 minutes before a meal.
 

Easy, on-the-go sachets

Want to take your iron on the go? These single-serve sachets of iron-rich water couldn’t be easier to pop in your bag, the car or your office drawer. Each sachet provides 5mg iron sulphate which contributes to the reduction of tiredness and fatigue and contributes to the normal formation of red blood cells.2,7 Ideally, mix into orange juice and take in the morning on an empty stomach, at least 30-45 minutes before eating or between meals – or you can drink from the sachet instead. We’ve chosen the original flavour but you can also try apple for a fruity iron drink.
 
Holland & Barrett Multivitamins & Iron 240 Tablets

14mg iron

Holland & Barrett

£9.49

£0.04/1 tablet

Your daily multivit, with added iron

Streamline your supplement routine with a daily multivitamin and iron supplement all in one. As well as 14mg iron, there’s vitamins B6 and B12 for immune support, vitamin D for normal bone and muscle function and vitamin C to help increase iron absorption.14, 16-19 With 240 tablets per bottle, you’ll get approximately eight months’ worth of daily iron and vitamins – that's value for money and peace of mind.
 
Better You Iron Spray 25ml

Quick absorption

BetterYou

RRP £10.95

£8.43

£33.72/100 ml

No tablets, no fuss, great taste

Find pills difficult or want something easy to take? BetterYou’s oral spray solves both these issues. Each pomegranate-flavoured spray provides 5mg gentle iron without the need for tablets. Oral sprays deliver nutrients directly into the bloodstream, bypassing the digestive system. Adults should take four sprays daily, either at once or spread across the day. Spray into the mouth, ideally inside the cheek and hold for a few seconds before swallowing. What could be easier?
 
Vitawell Gentle Iron 90 Vegan Tablets

Gentle formula

Vitawell

£8.00

£0.09/1 Pack

Smaller tablets, flat-pack pouch

Struggle with large tablets? Vitawell’s Gentle Iron tablets are smaller than many standard iron tablets for easy swallowing – yet they still provide your daily dose. Each tablet offers 14mg iron as well as vitamin C, vitamin B12 to help reduce tiredness and fatigue, plus folic acid which contributes to normal blood formation and normal psychological function.13,20,21

What’s more, these resealable flat pouches are letterbox-friendly (meaning you won’t miss your order) and fit into a pocket or purse for easy reach. Suitable for adults and children over 12 years old; swallow one tablet daily.
 

Iron supplement FAQs

What are the side effects of iron supplements?

Some people find that different forms of iron suit them better than others. You may want to choose a ‘gentle iron’ formula and take your supplements with a meal as this can feel more comfortable for some people. You might also notice darker than usual stools with certain types of iron supplements, especially prescription doses – but don’t worry, this is a well‑known effect of iron and is generally harmless. If you experience any unexpected changes or are concerned, speak to a medical professional.
 

How much iron do you need per day?

Women under 50 (or those over 50 who have periods) need 14.8mg iron per day. Men and postmenopausal women need 8.7mg per day.6
 

Is it safe to take iron supplements every day?

Yes, you can safely take iron supplements every day if your doctor has recommended them to you. According to the NHS, taking 17mg iron or less per day is unlikely to cause any harm.6 However, extremely high doses of iron may be fatal, so don't take more iron than is recommended on your supplements’ packaging and keep them out of children’s reach.6
 

The final say

Feeling more confident? Hopefully we’ve, er, ironed out the confusion and you’re on your way to picking a supplement that’s right for you. While you’re here, learn more about why iron’s so important for women or our ultimate guide to iron-rich foods...
Disclaimer – This article provides informational advice and is not a substitute for medical care. Working with experts for accuracy, we take great care to ensure the information is up-to-date and relevant. However, you should always consult your GP or healthcare professional before using supplements or alternative products, particularly if you have medical conditions or are under supervision.

Sources

1. European Commission. Characteristics [Internet]. European Commission [cited 2026 Apr 7]. Available from: https://ec.europa.eu/food/food-feed-portal/screen/health-claims/eu-register/details/POL-HC-6393
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4. NHS. Iron deficiency anaemia [Internet]. NHS [reviewed 2024 Jan 26; cited 2026 Apr 7]. Available from: https://www.nhs.uk/conditions/iron-deficiency-anaemia/
5. Derbyshire E, Aslam N, Mason P. Where Are We up to with Vitamin, Mineral and Omega-3 Polyunsaturated Fatty Acid Gaps? Intake and Status Findings from the UK National Diet and Nutritional Survey 2019 to 2023. Food and Nutrition Sciences [Internet]. 2025 Oct [cited 2026 Apr 7]; 16(10). Available from: https://www.scirp.org/journal/paperinformation?paperid=146610
6. NHS. Iron [Internet]. NHS [reviewed 2020 Aug 3; cited 2026 Apr 7]. Available from: https://www.nhs.uk/conditions/vitamins-and-minerals/iron/
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9. European Commission. Characteristics [Internet]. European Commission [cited 2026 Apr 7]. Available from: https://ec.europa.eu/food/food-feed-portal/screen/health-claims/eu-register/details/POL-HC-6458
10. European Commission. Characteristics [Internet]. European Commission [cited 2026 Apr 7]. Available from: https://ec.europa.eu/food/food-feed-portal/screen/health-claims/eu-register/details/POL-HC-649111. European Commission. Characteristics [Internet]. European Commission [cited 2026 Apr 7]. Available from: https://ec.europa.eu/food/food-feed-portal/screen/health-claims/eu-register/details/POL-HC-6498
12. European Commission. Characteristics [Internet]. European Commission [cited 2026 Apr 7]. Available from: https://ec.europa.eu/food/food-feed-portal/screen/health-claims/eu-register/details/POL-HC-6482
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