Edible mushrooms as a ubiquitous source of essential fatty acids

Abstract

Many different species of mushrooms are consumed around the world, after harvesting from nature or cultivated under controlled conditions. Fruiting bodies of mushrooms from the Agaricus, Lentinula, and Pleurotus genera are reported as the most cultivated and commercialized ones in many countries, while wild edible mushroom species vary greatly according to the growth location. Mushrooms are nutritionally well-balanced sources of carbohydrates and proteins, with low fat concentrations, usually ranging from 0.1 to 16.3% making them very health foods. Although mushrooms are not a choice source of lipids, they contain essential fatty acids such as linoleic, oleic, and linolenic in their lipid profiles, usually as the major constituents. Therefore, compared to other food of vegetal and animal origin, mushrooms have the advantage of possessing high levels of polyunsaturated fatty acids (PUFA). Percentage of these fatty acids (in 100 g of total fatty acids) in mushrooms varies greatly: linoleic acid ranges from 0.0-81.1%, oleic acid between 1.0 and 60.3%, and linolenic acid from 0.0-28.8%. A global overview of the lipid composition of mushrooms is presented in this review, emphasizing the presence and levels of monounsaturated fatty acids (MUFA) and PUFA. Literature points that, in mushrooms, unsaturated fatty acid levels are generaly greater than those of saturated ones, regardless of the continent where the mushroom is cultivated or harvested. Comparing individually different species of the same mushroom (Agaricus bisporus, Pleurotus ostreatus, and Boletus edulis) from different continents, similar fatty acid profile is also frequently observed. The great variety of edible mushrooms found worldwide and their consistent production of fatty acids, regardless the geographic source, make mushrooms an important source of essential fat acids for a human health diet.

Keywords: Basidiomycota; Food composition; Fungi; Health; Lipids; Omega-6.