At the beginning of the 20th century, brushing teeth was not a daily routine. In the United States, most people suffered from dental problems, yet very few used toothpaste. Within just a few years, however, toothbrushing became a national ritual practiced every morning and every night.
How did a habit that almost nobody followed become a universal routine? To understand this transformation, we need to look at the work of Claude C. Hopkins, one of the greatest advertisers of his era.
A Toothpaste That Seemed Impossible to Sell
When a friend asked Hopkins to promote a new toothpaste called Pepsodent, the idea looked doomed. At that time:
- toothpastes barely sold
- oral hygiene was widely neglected
- consumers saw no real reason to brush their teeth
For most people, brushing teeth was unnecessary, boring, and far from a priority. But Hopkins was about to create one of the biggest marketing successes in history.
The Secret Behind the Success: Understanding Habits
Hopkins believed that habits could be created using a simple formula: a clear cue and an immediate reward. If both elements were strong enough, a behavior could automatically repeat itself.
1. Identifying a Trigger
While studying dental manuals, Hopkins learned that teeth are naturally covered with a thin film. It is barely noticeable, yet it is something everyone can feel with their tongue.
He turned this simple sensation into a cue.
Pepsodent ads encouraged people to run their tongue across their teeth. The film was presented as a sign of poor hygiene. The moment someone felt it, the “signal” to brush became obvious.
2. Creating an Immediate Reward
Hopkins reinforced the habit by emphasizing visible and emotional rewards:
- a brighter smile
- whiter teeth
- a cleaner, fresher feeling
- a more attractive appearance
This combination of cue and reward generated desire—strong enough to turn occasional brushing into daily practice.
An Explosion in Demand
Sales were slow at first, but a few weeks later, demand skyrocketed. Factories struggled to keep up. In just a few years:
- Pepsodent became internationally popular
- toothbrushing became common across the country
- the morning brushing ritual became a cultural norm
Why This Story Still Matters
The Pepsodent case is now a classic example in marketing and behavioral psychology. It demonstrates that habits depend on:
- a simple, recognizable cue
- a clearly promised reward
This model is still used today by mobile apps, wellness programs, food companies, social networks, and more.
Conclusion
Toothbrushing was not a natural habit in the early 1900s. Thanks to a powerful understanding of human behavior—signal, reward, desire—it became a universal routine. Pepsodent didn’t just sell a product; it changed millions of lives.
