Description of Iron - GymBeam
Short summary
Iron fumarate capsules provide 14 mg of iron per dose, covering daily needs and helping with the formation of red blood cells and the reduction of tiredness. This cheaper form of iron more often causes stomach issues than the more expensive, gentler form (bisglycinate). It is suitable mainly for people with confirmed iron deficiency – e.g. women with heavy periods, vegans and endurance athletes. Do not take it without a real need, and keep out of reach of children.
8.1 / 10Our expert rating
Ingredient quality5.5
Formula transparency9.5
Effectiveness9.0
Safety9.5
Independent testing9.0
How to use
Take 1 capsule per day together with a glass of orange juice or another source of vitamin C – this improves iron absorption. Before starting, it is recommended to check your actual iron status with a doctor (blood tests).
Pros and Cons
Contributes to normal formation of red blood cells and haemoglobin
Helps reduce tiredness and fatigue
The dose (14 mg) matches daily requirements
Suitable for vegans and vegetarians – the capsule is of plant origin
Iron fumarate is a cheaper but less well-tolerated form – it more often causes nausea, constipation or stomach pain
Contains magnesium stearate (a small amount of a substance that prevents powder clumping)
Not intended for general, everyday use without a confirmed iron deficiency
Suitable for
People with confirmed iron deficiency (based on blood tests)
Menstruating women with heavy periods – increased iron losses
Vegans and vegetarians – plant-based diets contain less easily absorbable iron
Endurance athletes – increased iron losses due to intense training
Because it's a less gentle, but still effective form. The body tolerates and absorbs the gentler form of iron, called bisglycinate, better than common forms such as fumarate, which is what this product contains. In a study (Bumrungpert et al., 2022), the group using the gentler form achieved better results and significantly fewer side effects (nausea, stomach pain, constipation) than the group using fumarate. This doesn't mean fumarate doesn't work – it's simply a cheaper, less gentle choice, which is also why the price is lower.
Probably not routinely for you, unless you have a confirmed deficiency. The risk of iron deficiency is higher in women with heavy periods, pregnant women, vegans and vegetarians, frequent blood donors, and endurance athletes (NIH ODS) – so endurance training can increase your needs. The recommended daily intake for adult men is only around 8 mg per day, less than what this product already contains, so routine supplementation without a confirmed deficiency is generally not necessary.
We advise against it. If the body doesn't need iron, it can gradually accumulate in the organs, which isn't healthy in the long run. It's therefore advisable to check your actual status with blood tests before taking it, especially for men and postmenopausal women, who are at greater risk of accumulation (NIH ODS, 2025). Also keep it out of reach of children, as excessive iron intake is one of the leading causes of accidental poisoning in young children.
Because vitamin C helps with absorption, while milk can hinder it. Vitamin C helps the body absorb iron from plant-based foods more effectively, so it makes sense to drink a glass of juice or eat something rich in vitamin C alongside it. The effect is greater when vitamin C is consumed within the same meal, rather than simply counted toward the day's total intake (Cook and Reddy, 2001) – dairy products, on the other hand, can reduce iron absorption due to their calcium content, so it's better to take them separately.
No major allergens listed.
Take iron only in case of confirmed deficiency (blood tests) – in people without a deficiency, long-term supplementation can lead to iron accumulation in the body
Keep out of reach of children – excessive iron intake is one of the leading causes of accidental fatal poisoning in young children
Not suitable for children, pregnant women and breastfeeding mothers without medical advice
Use is not recommended in diseases involving iron accumulation (e.g. hemochromatosis)
Do not exceed the recommended daily intake
Ingredients
Iron fumarate, bulking agent (microcrystalline cellulose), anti-caking agent (magnesium stearate), hypromellose capsule.
Form:Capsules
Dose:1 capsule
Available flavors:Unflavored
Iron:14 mg
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