A study on the nutritional and biochemical analysis of Selaginella tamariscina powder

This study reports the various nutritional components of Selaginella tamariscina, which is traditionally used in folk or Chinese medicine. The iron nutrient content in S. tamariscina powder was 0.94 ± 0.06 mg/100 g powder, whereas selenium was present in a small amount, which showed strong antioxidant power. The total phenolic content of S. tamariscina powder was 8.65-11.61 mg gallic acid equivalents/g. S. tamariscina showed antioxidant activity in 2,2-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity. The ferric reducing antioxidant power of S. tamariscina powder was higher in the ethanol extract. Additionally, the ethanol extract demonstrated antimicrobial activity against Bacillus subtilis KCTC 2189. The level of high-density lipoprotein-cholesterol in the blood of ICR mice was significantly higher in the HF 20% + S. tamariscina 20% group than in the other groups (p < 0.05). The present study demonstrates that S. tamariscina, an abundantly existing plant, possesses antimicrobial, antioxidant, and anticytotoxic activities. S. tamariscina powder has potential as a functional food.