About 20% of what you need ...
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Asparagus has about 3 mg of iron in it per serving. The RDA is between 8-18.
This makes asparagus a very good source of iron, making it a food that can be an important part of a healthy diet when iron is a concern to you. You would need to eat approximately 5 cups of asparagus each and every day to reach the amount of iron that you require. So you will likely have to eat other healthy foods to reach that level.
Iron is a mineral found in all the cells and organs in our bodies with most of it being found in the red blood cells. Iron is also stored in the liver, spleen, bone marrow, and muscles.
Iron helps build protein in the body, which transport O2 throughout. And it is this O2 that gives us the energy we need to complete our day-to-day tasks. Someone with iron deficiency would feel lethargic and feel short of breath or irritable too.
Asparagus is a good source of iron and if you're looking to increase your iron intake then asparagus is an excellent choice. It's a food that is low in calories, low in carbohydrate and high in vitamins and minerals which makes it an attractive choice for most people.
Eat and enjoy.
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