Guinness is an Irish brand of beer that is popularly known to have very high iron content. Several facts about the beers manufactured by this company add up to the fact that they could possibly be high in iron content. They claim that they use the largest amount of roasted barley compared to almost any other beer brand. This supposedly adds to the iron quotient of the beer. They also claim to have been using the same yeast cultures for several decades now. This lends to the purity of the product. Although the company does not claim its beers as having high iron content, these are conclusions drawn from the ingredients, manufacturing process and general information gleaned about the beer.
It is also a well known fact that there are doctors who actually advise their patients to drink it because of its high iron content. However, it is important to note that beer cannot be a substitute for iron in your diet. It is also not to be consumed as a source of iron to take care of deficiencies in the human body. It is also important to note that beer is extremely high in calorific content and may cause more harm than good if taken with the intention of removing any kind of deficiency.
answered by M W