Nutritional value, chemical composition and antioxidant activity of three Tuber species from China.

Nutritional value, chemical composition and antioxidant activity of the traditional edible truffles Tuber latisporum, T. subglobosum and T. pseudohimalayense, from China were evaluated. Powder formulations of the three truffles revealed the presence of essential nutrients, such as proteins, carbohydrates and unsaturated fatty acids, and T. latisporum presented the highest contents of total sugar (50.10 g/100 g) and monounsaturated fatty acids (265.19 mg/100 g dw); T. pseudohimalayense showed the highest content of polyunsaturated fatty acids (367.98 mg/100 g dw). They all presented a low fat content but high contents of proteins and unsaturated fatty acid, which is beneficial to human health. The methanol extract from T. pseudohimalayense showed a high radicals scavenging activity and the highest content of total phenols (735.01 mg/100 g dw); T. subglobosum presented the highest content of flavonoids (1355.43 mg/100 g dw). All these extracts could be used as potential antioxidant sources to prevent diseases related to oxidative damage.