Abstract
Recently, consumption of mushroom is on the increase in many developing countries. They serve as food supplements in diets of the people. The present study was conducted to evaluate nutraceutical properties of the oyster mushroom (Pleurotus ostreatus), a widely cultivated mushroom in Nigeria. Properties such as proximate composition, mineral ions and antioxidants contents were analyzed using standard methods. P. ostreatus was found to contain high percentage of crude fibre, moisture content, carbohydrates, crude fat, total ash, crude protein and oil matter. Percentage of mineral ion such as sodium, calcium, potassium, magnesium, phosphorus, iron, copper and zinc were found to be lower in value. Antioxidants such as flavonoid, phenol, lycopene, β Carotene and ascorbic acid in P. ostreatus were found to be high in value. Overall, the percentage content of minerals in P. ostreatus was less than 1%, proximate composition was 33.64% and antioxidants was 66.16%. This showed that P. ostreatus had a high content of antioxidants, moderate amount of proximate composition and low amount of minerals. As P. ostreatus contains low calorific value and very high content of antioxidants, dietary fibres and minerals, it can therefore be said to be potentially good for medicinal purposes especially among the vegetarian consumers
Highlights
Consumption of mushroom is on the increase in many developing countries
The high water content (10.7±0.52) of P. ostreatus from this study was in agreement with that of Adejumo and Akinmoladun (2015) who found the moisture content of some edible and medicinal mushrooms to be between 7.1212.36%
The high content of moisture in this mushroom and others is an indication that fresh mushrooms cannot be stored for a long time as a result of microbial activities on them which is aided by their high moisture content
Summary
Consumption of mushroom is on the increase in many developing countries. The present study was conducted to evaluate nutraceutical properties of the oyster mushroom (Pleurotus ostreatus), a widely cultivated mushroom in Nigeria. Properties such as proximate composition, mineral ions and antioxidants contents were analyzed using standard methods. Percentage of mineral ion such as sodium, calcium, potassium, magnesium, phosphorus, iron, copper and zinc were found to be lower in value. Antioxidants such as flavonoid, phenol, lycopene, β Carotene and ascorbic acid in P. ostreatus were found to be high in value. As P. ostreatus contains low calorific value and very high content of antioxidants, dietary fibres and minerals, it can be said to be potentially good for medicinal purposes especially among the vegetarian consumers
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