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SiS Iron Complex - 90 Tablets (Unflavoured)


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health wellbeing
immune system
gluten free
wheat free
dairy free
nut free


Product Information

Iron is an essential mineral in the body and its main functions are within the cardiovascular system, supporting the maintenance of healthy red blood cells and oxygen transportation within the body. Red blood cells contain a protein called haemoglobin, this iron containing protein binds oxygen to the red blood cell and facilitates oxygen carrying around the body.

Key Features:

  • • 25 mg iron, 3.2 mg copper, 8 mg zinc per tablet
  • • B-vitamins
  • • Iron contributes to a reduction of tiredness and fatigue, normal immune function, red blood cell formation and oxygen transport in the body
  • • Consume 1 tablet per day as required
  • • Informed Sport tested

Product Uses
Recommended Usage

Consume 1 Iron tablet per day, with food.


Iron requirements in exercising populations, especially those undertaking endurance type training, appears to be higher than that of their sedentary counterparts, owing to increased iron losses and quicker red blood cell breakdown associated with exercise.

Iron is found in a wide range of foods including plant and meat sources, however, the iron found in plants is less bioavailable than the iron found in meat. Dietary preferences and increased exercise volumes are risk factors for low iron count. However, iron supplementation should only be considered by those with identified deficiencies or working alongside a professional, as excess iron intake has no proven benefit and could lead to iron poisoning.

Our complete product range is developed using a world-class approach to banned substance testing, providing assurance for athletes. For more information on Informed Sport & our unique world class approach, click here.

Suitable for: Vegetarians; Vegans; Coeliacs; Nut Free; Lactose Free; Soya Free

Nutritional Info
Active IngredientsPer Tablet% RI*
Iron as Bisglycinate 25mg 178.6%
Copper as Bisglycinate 3.2mg 320%
Zinc as Bisglycinate 8mg 80%
Riboflavin (Vitamin B2) 700µg 50%
Vitamin B12 (Cyanocobalamin) 1.25µg 50%
Folic Acid (Vitamin B9) 100µg 50%

*reference intake of an average adult (8400 kj/2000 kcal).


Bulking Agent (Dicalcium Phosphate, Microcrystalline Cellulose), Iron Bisglycinate, Copper Bisglycinate, Zinc Bisglycinate, Glazing Agents (Hypromellose, Miglyol, Hydroxypropylcellulose), AntiCaking Agent (Magnesium Stearate, Silica), Riboflavin (Vitamin B2), Vitamin B12 (Cyanocobalamin), Folic Acid. 

Read More

What is iron?

Iron is an essential mineral that we must obtain through the diet, as our body cannot naturally produce this.

What role does iron play in the body?

Iron supports normal immune function, cardiovascular health, red blood cell production, oxygen and carbon dioxide transport in the blood and a reduction in tiredness and fatigue.

Where is iron found in the diet?

Iron is found in a wide range of foods, including meat (heme) and plant (non-heme) sources. However, plant sources of iron have lower bioavailability than meat.

Who is this for?

Active populations and specifically those involved with endurance type training are at a higher risk of low iron, due to the increased losses and quicker red blood cell breakdown associated with exercise.

How should this be supplemented?

Take one tablet per day, with food.

Can I take too much iron?

Yes, there is no benefit to excess iron consumption. In addition, too much dietary iron could lead to iron poisoning. Supplementation should only be undertaken by those with identified deficiencies or working alongside professionals.

Are there any allergens?

No, Iron Complex does not have any allergens and is suitable for vegans, vegetarians, coeliacs, lactose intolerant or those with nut allergies.

Is it Informed Sport tested?

Yes, Science in Sport Iron Complex is tested under the Informed Sport programme.

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Verified Reviews

Rated 4.7 out of 5 based on 6 Reviews

All as described and Batch tested.


Good price


Do not take on an empty stomach !

Wayne Davies

A great way to maintain your iron levels when you’re pushing your limits.


Do what they are supposed to. My wife needs extra iron and these do the job. Great quality.

Viorel Florin Sandu

Excellent quality, like everything else I've bought from SiS.