Tongue scraping: an old habit with unusually good receipts

Cleaning the tongue — jihwa nirlekhana or jihwa prakshalana in classical texts — has been part of the Ayurvedic morning routine (dinacharya) for as long as the routine has been written down. The Charaka Samhita recommends it alongside brushing, oil pulling, and bathing.

What the research compares

Unlike many traditional practices, tongue cleaning has been tested head-to-head. A 2004 study in the Journal of Periodontology compared tongue scraping with tongue brushing and found the scraper measurably better at reducing the volatile sulfur compounds responsible for most breath odor. Reviews since then — including work summarised by the American Dental Association — generally agree that cleaning the tongue helps with breath, and that scrapers tend to outperform brushes for this purpose.

Of the many practices in dinacharya, this may be the easiest one to defend on evidence alone.

What remains uncertain

What is not established is whether tongue cleaning improves taste perception, digestion, or systemic health — claims the tradition makes but current research has not verified. It is also not a substitute for treating persistent bad breath with a dentist, since the causes can be medical.

The practice, simply

• Use a dedicated scraper — metal or copper — in the morning, before eating.
• Draw it gently from the back of the tongue forward, five to seven passes.
• Rinse the scraper between passes. Light pressure; never scrape to the point of pain or gagging.
• If you have a tongue condition, oral piercing, or recent dental work, ask your dentist first.