Despite its use as an ingredient in food for human consumption, studies on systemic toxicity (e.g., acute, subacute, chronic and subchronic toxicities) of B. pilosa in humans and animals are still inadequate and insufficient. So far, acute, and/or subchronic toxicities have been evaluated in rats and mice. Oral acute and 28-day toxicities of water extract of B. pilosa leaves were evaluated in Wistar rats [132]. An oral dose of water extract of B. pilosa leaves at 10 g/kg BW showed no obvious mortality or changes in the appearance in rats [133]. The same extract at 0.8 g/kg BW/day, once a day, showed no obvious sub-chronic toxicity in rats over 28 days, as measured by survival rate, body weight, and gross examination of organs [133]. These data are consistent with our data indicating that oral delivery of the water extract of the B. pilosa whole plant at 1 g/kg BW/day, once a day, is safe in rats over 28 days (unpublished data). Taken together, these studies suggest that ingestion of B. pilosa aqueous extract at up to at 1 g/kg BW/day, once a day, is highly safe in rats. In addition, the acute toxicity of aqueous and ethanol extracts of B. pilosa in mice have been reported [133]. Five- to six-week-old mice with weights between 28 and 35 g received a peritoneal injection of both extracts at the different doses. The LD50, the dose that causes 50% lethality, of the aqueous and ethanol extracts in mice was 12.30 g/kg BW and 6.15 g/kg BW, respectively [133]. A complete toxicological study has not been completed for humans. Furthermore, the drug interactions of B. pilosa with other drugs are unknown. Further safety verification and clinical trials should be performed before B. pilosa can be considered for medicinal use.