Mealworms with the correct microbiome are capable of safely eating polystyrene with no adverse health effects, but there is still plastic residue in the frass they produce. This artle was not read in full, only skimmed.
Frass: Polystyrene
Full article
https://www.sciencedirect.com/science/article/pii/S0045653521013114
Reference
(Yang, et al. 2018)
Yang, S.-S., Brandon, A. M., Andrew Flanagan, J. C., Yang, J., Ning, D., Cai, S.-Y., Fan, H.-Q., Wang, Z.-Y., Ren, J., Benbow, E., Ren, N.-Q., Waymouth, R. M., Zhou, J., Criddle, C. S., & Wu, W.-M. (2018). Biodegradation of polystyrene wastes in yellow mealworms (larvae of Tenebrio molitor Linnaeus): Factors affecting biodegradation rates and the ability of polystyrene-fed larvae to complete their life cycle. Chemosphere (Oxford), 191, 979–989. https://doi.org/10.1016/j.chemosphere.2017.10.117
This article is open source, so hopefully I haven't made any IP infringements.
