No, it is not generally recommended as a daily substitute for toothpaste, especially due to its potential for enamel erosion. Brushing with salt should be limited to occasional use, as frequent use can damage tooth enamel and irritate gums. Salt is a mild abrasive, and excessive use can damage tooth enamel, the hard outer layer that protects teeth. Salt can be a beneficial addition to oral hygiene in moderation, but it is best used in addition to regular fluoride toothpaste.