Spice Safety Fact Sheet

ASTA signed onto an FBIA coalition letter to the Food and Drug Administration(FDA) in July 2021 regarding concerns related to recent developments in the state of New York pertaining to its food recall policies, in which the state's newly updated recall manual includes proposed threshold limits for certain contaminants, including heavy metals and allergens.

In 2026, ASTA collaborated with academic and industry partners in Vietnam to conduct a follow-up study expanding upon 2025 research investigating the potential role of lichen and moss present on the outermost bark layer of Vietnamese cassia in relation to heavy metal contamination. By comparing lead concentrations in bark, underlying wood, and surface-growing lichen, the study confirmed that lichen function as bioaccumulators, effectively capturing airborne dust and heavy metal particulates from the surrounding environment. These findings indicate that lead contamination is primarily a surface issue, suggesting that the issue is manageable through targeted mitigation strategies, including lichen removal prior to cassia processing. As next steps, researchers will evaluate technical approaches for lichen removal, assess seasonal variability in lead accumulation, identify potential sources of airborne lead, and support the development of enhanced pre-processing standards and best practices.