Negatively charged food additive dye "Allura Red" rapidly induces SDS-soluble amyloid fibril in beta-lactoglobulin protein.

•Allura red dye rapidly induces amyloid-like fibril in bovine beta lactoglobulin at acidic pH.•The electrostatic and hydrophobic interaction is mainly responsible in amyloid fibril formation.•Allura red-induced amyloid fibril is SDS soluble.