We are looking for edible fibers that can be used in the food industry
does silk fiber edible? And does the FDA approve?
Many thanks for considering my request.
Even though silk fiber is protenicious in nature but it is not edible (most of the silk fiber is used in the textile industry) whereas, various other parts of silkworm are found to be edible in many parts of the world including India. Recently, chemical composition of de-silked (after removal of silk) pupae has attracted considerable attention in the world and silkworm pupae are considered to be a good source of a large number of bioactive substances. Upon value addition to pupa it gives a delicious taste and has enormous health benefits.
Silk fibroin has been studied as an edible coating to preserve various foods (see Marelli et al. 2016). A GRAS application for silk fibroin has been submitted, but FDA has yet to reply (https://www.cfsanappsexternal.fda.gov/scripts/fdcc/?set=GRASNotices&id=930).
Marelli, B., Brenckle, M., Kaplan, D. et al. Silk Fibroin as Edible Coating for Perishable Food Preservation. Sci Rep 6, 25263 (2016). https://doi.org/10.1038/srep25263
FDA has specific requirements for certain dietary fiber claims. A product must contain 20 percent or more of the DRV per reference amount customarily consumed (RACC) to be considered “high” in fiber and between 10 and 19 percent to make a “good source of fiber” claim
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