Extracts of beef (bovine) liver are a rich natural source of many vitamins and minerals, including iron.
Liver extracts are available as nutritional supplements in capsules and tablets.
As it is not an essential nutrient, no deficiency state exists.
Iron-deficiency anemia
No side effects or adverse reactions have been reported. Liver extracts should not be used by people suffering from iron-storage disorders, such as hemochromatosis. As the liver is a major filtering organ for many potentially toxic environmental chemicals, some doctors are concerned that consumption of liver extracts may result in increased intake of these chemicals. At the time of writing, there were no well-known drug interactions with liver extracts.
The recommended amount depends on the concentration, method of preparation, and quality of the liver extract.
Pollen, a substance collected from the flowers of various plants, contains carbohydrates, fat, protein, and some vitamins and minerals.
Most noncultivated plants produce pollen. Commercial pollen is collected from bees returning to their hives (bee pollen) or may be directly harvested with machines (flower pollen). It is not clear which plants produce the most effective pollens. Some of the most common pollens used are timothy grass, corn, rye, and pine.
Since pollen is not an essential bodily constituent, deficiencies do not occur.
Benign prostatic hyperplasia (rye) Prostatitis (rye)
Many people have allergies to inhaled pollens. Allergic reactions to ingested pollen (some of them quite serious) have also been reported. Otherwise, no significant adverse effects have been reported. At the time of writing, there were no well-known drug interactions with Pollen.
The optimal intake of pollen is unknown. Some doctors recommend using 500 mg two to three times per day. Research on the proprietary rye pollen extract has used three to six tablets, or four capsules, per day.