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Context: Ystyr “cymhareb wanedu berthnasol” yw (a) y gymhareb wanedu a nodir ar becynwaith y ddiod ysgafn, neu a gyfrifir drwy gyfeirio at wybodaeth a nodir ar becynwaith o’r fath, neu (b) pan na fo cymhareb wanedu neu wybodaeth o’r fath wedi ei nodi, cymhareb wanedu diodydd tebyg sydd ar y farchnad.
Notes: Daw'r testun cyd-destunol o Reoliadau Bwyd (Hyrwyddo a Chyflwyno) (Cymru) 2025
