No, there are many herbs and other minerals needed by human body in bath salt. Edible salt is not good for human body without these things.

Bath salts are mostly composed of herbs, natural ground salts, natural sea salts, minerals and plant essential oils, and are rich in trace elements such as iron, calcium, selenium and magnesium. Long-term use of bath salts can eliminate melanin on the skin, make the skin white, tender and elastic, and also have a positive effect on removing facial acne, acne and spots.