Iron-rich stew for athletes

Iron is an essential mineral for the human body and athletes especially should pay extra attention on ensuring sufficient intake and absorption of this nutrient. We combined some great iron-rich ingredients into a pot to make this delicious project easier and tastier.

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Iron is an important mineral for the human body for different functions. Iron plays an important role in building new red blood cells which deliver oxygen to the bodies’ tissues. Iron is also needed for energy maintenance, immunity and DNA synthesis. Iron deficiency is common among endurance athletes, especially women, who have increased loss of red blood cells via bleeding, higher turnover rate due to mechanical break down of the cells and higher rate of iron-rich mitochondria. Decreased iron stores can eventually lead to iron deficiency anemia where the size and amount of hemoglobin and red blood cells is decreased. This leads to poor oxygen supply to tissues (like skeletal muscles) which in turn limits their work capacity. Anemia’s symptoms include fatigue, pallor, shortness of breath, dizziness, poor tolerance of exercise, weakness and rapid heartbeat. Iron deficiency without anemia has also been shown to cause reduced endurance capacity, increased oxygen consumption and impaired adaptation to endurance exercise.

Vegan and vegetarian athletes are in greater risk of iron deficiency and anemia due to the form of iron found in a plant-based diet. Omnivorians, vegetarians and vegans usually do get the same amount of iron from their diet but the form of iron plays an important role in how the body can use it. The main source of iron in plant-based diet is in non-haem form when in animal products it is of haem form. Non-haem iron is less well absorbed from the gut than haem iron. Also the vegan and vegetarian diets often contain nutrients like polyphenol tannins (found in coffee, tea, and cocoa) and phytates (found in whole grains and legumes) which reduce iron absorption from the diet. The human body can usually adapt to a variation of iron intake from the diet by regulating the amount of absorption and secretion from the gut, but if the turnover of iron greatly exceeds the amount gotten from food for longer periods of times, the iron stores will eventually be used and iron deficiency and anemia may occur.

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The daily recommendation of iron for men aged 19-50 is 8 mg and women 18 mg. The best way to get enough iron during the day is to make sure to eat iron rich foods during each meal. Vitamin C enhances absorption of iron when consumed at the same time with iron so it is recommended to eat for example an orange for dessert. In addition one can try to avoid consumption of high-phytan foodstuffs like coffee and tea which inhibit the absorption of iron. Athletes who are prone to developing iron deficiency should consider iron monitoring by blood tests. Sometimes iron supplements are needed to stabilize the balance if the deficiency has developed too far.

There are some good sources of iron in the plant field that you can find in the list below. The low-FODMAP ingredients are written in bold.

TOFU, 125g: 6.8 MG (38%)

SPINACH, COOKED, 1 CUP: 6.4 MG (36%)

SOYBEANS, COOKED, 1/2 CUP: 4.4 MG (24%)

SWISS CHARD, COOKED, 1 CUP: 4.0 MG (22%)

TEMPEH, 125 g: 4 MG (22%)

BLACKSTRAP MOLASSES, 1 TABLESPOON: 3.6 MG (20%)

LENTILS, COOKED,150 g : 3.3 MG (18%)

POTATO, COOKED with skin, 1 LARGE: 3.2 MG (18%)

TURNIP GREENS, COOKED, 1 CUP: 3.2 MG (18%)

COCONUT MILK, 2 dl, 3,2 MG (18%)

QUINOA, COOKED, 1 CUP: 2.8 MG (16%)

BEET GREENS, COOKED, 1 CUP: 2.7 MG (15%)

TAHINI, 2 TABLESPOONS: 2.7 MG (15%), low-FODMAP when consumed 1 tbsp

PEAS, COOKED, 100 g: 2.5 MG (14%)

BLACK EYED PEAS, COOKED, 1/2 CUP: 2.2 MG (12%)

CASHEWS, RAW OR ROASTED, 1/4 CUP: 2.1 MG (12%)

KIDNEY BEANS, COOKED, 1/2 CUP: 2.0 MG (11%)

CHICKPEAS, COOKED, 1/2 CUP: 1.8 MG (10%)

BLACK BEANS, COOKED, 1/2 CUP: 1.8 MG (10%)

BOK CHOY, COOKED, 1 CUP: 1.8 MG (10%), low-FODMAP when consumed 75 g

BULGUR, COOKED, 1 CUP: 1.7 MG (10%)

This all may sound complicated and time consuming. That’s why we have come up with a recipe for an iron-rich stew to give you inspiration to eat a complete and healthy diet. The ingredients are rich in iron and make up a delicious thai-style dish. It is a great choice for a dinner after a long day out training. We also like to pack it with us in a food thermos and eat after a run out in the woods. Remember to take an orange for dessert to boost the absorption of iron!

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Iron-rich coconut-tempeh stew

Ingredients:

  • 250g tempeh

  • 300g broccoli

  • fresh spinach

  • 500g potato

  • 2dl coconut milk

  • 1 lemon grass

  • ½ lime zest

  • 4 cm fresh ginger

  • 2 tbsp soya sauce

  • ½ tsp chili flakes

  • parsley and nuts for serving

Grate ginger and lime zest and chop lemon grass. Cut potatoes and broccoli into cubes. Boil the spices in water for few minutes before adding in the potato and broccoli chunks. Meanwhile cut the tempeh into cubes. Fry tempeh cubes in a pan in oil until golden brown. When the vegetables are almost ready, add the coconut milk, soya sauce, fried tempeh and fresh spinach. Serve with parsley and nuts.

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Average nutritional value (base without toppings) per 100 g

Energy 311 kJ / 73 kcal

Fats 4 g

Carbohydrates 4 g

Of which sugars 1 g

Dietary fiber 1 g

Protein 6 g

Iron 2 mg





RESOURCES

1. Rogerson D. Vegan diets: practical advice for athletes and exercisers. J Int Soc Sports Nutr. 2017;14:36. Published 2017 Sep 13. doi:10.1186/s12970-017-0192-9

2. Olli Ilander, Patrik Borg, Marika Laaksonen, Katja Pethman, Annika Marniemi, Jaakko Mursu ja Carola Ray; Liikuntaravitsemus, 2.edition 2008

3. HADDAD EH, BERK LS, KETTERING JD, HUBBARD RW, PETERS WR. DIETARY INTAKE AND BIOCHEMICAL, HEMATOLOGIC, AND IMMUNE STATUS OF VEGANS COMPARED WITH NONVEGETARIANS. AM J CLIN NUTR 1999;70(SUPPL):586S-93S.

3. OBEID R, GEISEL J, SCHORR H, ET AL. THE IMPACT OF VEGETARIANISM ON SOME HAEMATOLOGICAL PARAMETERS. EUR J HAEMATOL. 2002;69:275-9.

4. MANGELS R MV, MESSINA M. THE DIETITIAN’S GUIDE TO VEGETARIAN DIETS. 3RD ED. SUDBURY, MA: JONES AND BARTLETT, 2011.

5.  https://www.thefullhelping.com/15-iron-rich-vegan-food-combinations/

6. HURRELL R, EGLI I. IRON BIOAVAILABILITY AND DIETARY REFERENCE VALUES. AM J CLIN NUTR 2010;91:1461S-7S