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Halal Certified L-Cystine

Halal L-Cystine E921 Halal L-Cystine E921 is an amino acid manufactured through fermentation. As a synthesized chemical, this amino acid is general recognized as halal. L-Cystine E921 is mostly made from human hair, chicken or duck feathers, boar bristles etc., or it can be synthetic.  It is halal and can be found
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