You Need Iron? Eat Seaweed

Gram for gram, choose edible seaweed
Iron is present in seaweed at higher levels than in many well-known land plants, such as meat and spinach. In fact, there is more iron in 8g of Dulse than in 100g of raw sirloin steak.
This makes edible seaweed a great choice for vegans and vegetarians looking to supplement their diets naturally. However, for most people, as part of a balanced diet a single 2g serving of Dulse would be a sufficient contribution to your daily intake of iron.
Why iron is important
Iron is an essential mineral and part of all body cells. Its most important role is carrying oxygen from our lungs around the body, as part of the protein haemoglobin. Iron also helps muscles store and use oxygen, which is why without iron we become physically and mentally fatigued.
Further reading
You can read more about the research behind these findings in an article taken from Royal Society of Chemistry; 1993, Institut de Phytonutrition 2004 about The Value of Edible Seaweeds [PDF].