Around a fifth of those surveyed had experienced more severe food hardship, such as going without eating for a whole day or their household having ran out of food.
Roedd tuag un rhan o bump o’r rhai a holwyd wedi profi caledi bwyd mwy difrifol, fel mynd heb fwyd am ddiwrnod cyfan neu roedd y bwyd yn y cartref wedi dod i ben.