Iron is an essential trace element that is needed to maintain the functionality of the organism. Iron plays a key role in the formation of hemoglobin, the red blood pigment. This takes on the important task of transporting oxygen in our body. Iron is also found in myoglobin, which serves as an oxygen store for the muscle. In a healthy adult, about two-thirds of iron is stored in the body as hemo- and myoglobin, with the rest in the liver and bone marrow.
 
 
 Iron is supplied to the body through food. This is mainly found in red meat, fish, whole grains, spinach, peas, black salsify, quinoa, millet, amaranth and wheat bran. On average, women (~15mg/day) need to absorb more iron than men (~10mg/day). In order to be able to cover this need to some extent, a balanced diet is essential. For women and vegetarians, however, the daily amount is usually hardly achievable.
 
 An iron deficiency can lead to anemia, a weakened immune system, poor concentration, sleep disorders and symptoms of tiredness. Physical signs such as brittle nails and hair loss can also occur. These deficiency symptoms are more common in women because women regularly lose iron from their bodies through menstruation. These deficiencies make an additional supply of iron necessary.
 
 The iron bisglycinate it contains has the highest bioavailability of all other iron compounds, because the iron is flanked by two glycine amino acids and the body can therefore optimally absorb it. A study has shown that ferrous bisglycinate is 59% better absorbed by the body than ferrous sulfate.