Charcoal, Salt And Neem: The Tooth Care India Was Told To Forget — Then Sold Back

Think back to a village morning, before tubes and plastic brushes. Someone takes a pinch of fine black powder from a small tin. Charcoal, ground soft. Sometimes a little salt mixed in. They rub it on their gums with one finger — slowly, like a massage, not a scrub. In houses where meat was eaten, a neem twig came out afterwards to pick away what was stuck between the teeth.

Nobody called this a “method”. It was simply what the morning looked like.

Then, in 1985, Colgate’s advertising told India that this was a mistake. And by 2019, the same ingredients were back on the shop shelf — inside a tube, with a brand name on it.

This is the first article in a Vedhan Sri investigative series on Indian health knowledge that was sidelined or replaced. Every article asks the same five questions: what did the old sources actually say, what changed, who drove the change, what evidence connects the change to health today, and which parts are documented, plausible, disputed or simply unknown. We will be honest about all four.

What The Old Texts Actually Describe

Cleaning the teeth sits at the very start of the daily routine — dinacharya, the traditional daily routine — in India’s classical health texts. The Charaka Samhita (Sutrasthana, chapter 5) places dantadhavana, tooth cleaning, among the first tasks of the morning, done with chewing twigs of astringent, pungent or bitter taste.

The Sushruta Samhita (Chikitsasthana, chapter 24) goes further. It names twigs by taste, with neem (nimba) among the bitter ones, and describes a tooth-cleaning paste that includes rock salt — saindhava lavana. Elsewhere, the Charaka Samhita ranks rock salt as the best of all salts.

So two of the three ingredients in our village morning — neem and salt — are written into texts that are well over fifteen hundred years old.

The third one needs honesty. We have not found charcoal named for teeth in these classical verses. Its record is different. It lives in household practice — and, as you will see, its clearest written proof comes from the very company that tried to end it.

What Families Actually Did

Written texts are one kind of source. Living practice, handed from grandparent to grandchild, is another. In Vedhan Sri’s family, the practice was passed down across generations in a very particular way:

• Fine powder, not grains. Charcoal and salt were crushed soft — nothing crystalline or gritty.
• Gums, not teeth. The powder went on the gums. The purpose, as it was taught, was strong gums — because strong gums hold the teeth.
• Massage, not brushing. A slow finger massage. No scrubbing motion at all.
• Neem for what got stuck. Families who ate meat also used neem twigs or tree bark to lift food from between the teeth and at the gum line. Neem was chosen deliberately, because it was trusted to keep any small scrape clean.
• Different villages, different mixes. Some regions used mainly charcoal, some mainly salt, some both together.

None of this was written in a manual. It did not need to be. It was taught by showing, and corrected by feel — if the powder was too coarse, your gums told you at once.

Vedhan Sri says

What our grandmothers did without a label, the market now sells with one. Learn to read the practice, not the packet.

S Ramesh Babu · 28+ years of practice

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What Changed: A Timeline From Colgate’s Own Records

We did not want to build this story on rumours. So the timeline below is taken from Colgate-Palmolive India’s own published company history, and from dated press coverage. Read it slowly.

Charcoal. Salt. Neem. Even oil pulling. Every item from the old morning routine came back — each one with a brand name, a price and a plastic pack.

The 1985 Adverts

The TV advert is remembered by name in Indian advertising writing. A bodybuilder asks for almonds and milk for his body — and charcoal, koyla, for his teeth. His sister-in-law laughs: “Badan ke liye doodh-badaam, aur daaton ke liye koyla?” A voice-over then warns that rough substances spoil the enamel, and the toothpowder is offered as the safe answer.

A Hindi print advertisement from the same campaign is sharper still. Its headline reads:

“नमक और कोयले जैसे खुरदुरे पदार्थ आपके दांतों के इनेमल की परत को नुकसान पहुँचा सकते हैं।”

In English: rough substances like salt and charcoal can damage the enamel layer of your teeth. Notice the first word. It is not only charcoal. It is salt — named first, and underlined.

In 2005, Colgate launched Active Salt. The ingredient its own advert had called a danger to enamel became the selling point of one of its best-known toothpastes.

The original TV broadcast copy is not publicly available. When asked about it years later, Colgate acknowledged the advert but said it could not share it. Our account of the TV version rests on two published retrospectives that record the dialogue.

Now look at what the warning did not say. It did not say which salt or which charcoal. It did not say how finely ground. It did not say whether it meant rubbing on the gums or scrubbing on the teeth. It did not show a study. It placed one idea in millions of minds: the kitchen is crude, the tube is modern.

And here is the quiet irony. Those adverts are the clearest written proof that salt and charcoal tooth care was common enough, in 1985, to be worth attacking.

The Question Nobody Asked: Which Form?

Whenever tradition is questioned, the first demand is usually: prove it — which form, how much, how often? That is a fair question. But it has to be asked of everyone, not only of grandmothers.

What about the science on the new products? In 2017, the Journal of the American Dental Association published a review of charcoal toothpastes. The reviewers found too little clinical and laboratory evidence to support either the safety or the benefit claims made for them. The same authors also noted recorded cases where charcoal particles lodged in gum tissue and left a bluish line.

That is worth holding in mind — for tins and tubes alike. Nobody has studied charcoal in the specific way it was used in these households: finely powdered and massaged into the gums. That study simply does not exist. It was never funded, because a practice that costs nothing has no sponsor.

One more thing the 1985 adverts never examined was the brush itself. Dentists today have a name — toothbrush abrasion — for wear caused by hard bristles and heavy scrubbing. The old practice, which did not scrub at all, was never compared against it.

What If The Tradition Had Been Studied Instead Of Mocked?

Imagine a different 1985. Instead of an advert, a study. Researchers go to the villages, record exactly how the powder was prepared, how it was applied, and follow the people who used it. Whatever they found — good, bad or mixed — we would know today. Families would have been given evidence instead of embarrassment.

That did not happen. What happened instead follows a pattern this series will keep meeting: a practice is made to look backward, it is replaced, and later the same ingredient returns inside a product. Next in this series we will follow that pattern through cannabis medicine, country chicken, and millets — the grain India sidelined for decades before the world celebrated 2023 as the International Year of Millets. For how Siddha knowledge itself was carried down the generations, read our history of Varmam.

Where the evidence stands

A Five-Step Family Record

This practice uses no powder and no product. It is about keeping a memory before it disappears — the oldest way Indian health knowledge was ever preserved.

Ask The Elders

Some elders will remember every detail; some will remember nothing at all — both are normal, and both are part of the record.

Final Thoughts

This is not a story about charcoal being magic, or toothpaste being evil. It is a story about who gets asked for proof. For forty years, the burden fell only on the household practice. The adverts that attacked it, and the products that later sold it back, were never asked the same question.

The fair position is the simple one: ask everyone for the same evidence. Until that evidence exists, the old practice deserves to be remembered accurately — as history, carefully described — and not as a joke from a 1985 advert.

Frequently Asked Questions

Did people in India really clean their teeth with salt and charcoal?

Household practice and the 1985 adverts both say yes. The warning only makes sense if salt and charcoal tooth care was common enough to compete with toothpowder. Rock salt and neem twigs are also named in classical Sanskrit texts; charcoal is not, as far as we have found.

Is charcoal toothpaste proven to be better or safer?

No. A 2017 review in the Journal of the American Dental Association found too little evidence to support the safety or benefit claims made for charcoal toothpastes.

Should I start using charcoal or salt on my gums?

This article describes history, not a treatment. Nobody has studied the traditional method properly, so there is no evidence either way. Please speak to your dentist before changing how you care for your teeth and gums.

References & Further Reading

• Charaka Samhita, Sutrasthana chapter 5 — daily routine and tooth cleaning (dantadhavana).
• Sushruta Samhita, Chikitsasthana chapter 24 — tooth-cleaning twigs by taste, and a cleaning paste with rock salt (saindhava).
• Colgate-Palmolive (India) Ltd, company history — colgateinvestors.co.in/history — 1937, 1949, 2014, 2016–17, 2018, 2019 and 2020 entries.
• MediaBrief, April 2024 — Colgate Active Salt available “since 2005” — mediabrief.com.
• ThePrint, August 2022 — the 2010 “namak hai” campaign — theprint.in.
• afaqs! (September 2016) and OneYearMBA (September 2015) — retrospectives recording the 1985 TV toothpowder advert and its dialogue. The original broadcast copy is not publicly available.
• Colgate Hindi print advertisement (“namak aur koyle jaise khurdure padarth…”), circulated online as 1985 since at least February 2019; original publication not traced.
• Brooks JK, Bashirelahi N, Reynolds MA. “Charcoal and charcoal-based dentifrices: A literature review.” Journal of the American Dental Association, 2017;148(9):661–670 — DOI: 10.1016/j.adaj.2017.05.001; and the same authors’ follow-up letter, JADA 2017;148:785.
• Product names are used only to identify products in a historical account; brand names belong to their owners.
• S. Ramesh Babu, Varmam – An Insight into the Ancient System of Healing: A Symposium on the Science of Life Force, Volume I (Revised Edition) and Volume II.

This is wellness education, not medical treatment. It does not replace advice from your doctor. Results vary from person to person.