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The idea for Head & Shoulders dates back to about 1950.
At that time, Procter & Gamble research determined that
consumers were not completely satisfied with the
then-existing anti-dandruff shampoos. What we had to do
was find a new and effective ingredient against dandruff.
After ten years of searching, P&G scientists found one that
really worked! Pyrithione zinc.
In the 1950s, Procter & Gamble began screening tests to
identify dandruff control agents. Over two thousand such
ingredients were evaluated. Basically each compound was
screened for three properties:
- It must retain its activity in the presence of sebum (scalp oils).
- It must remain on the scalp after shampooing.
- It must be safe for normal usage in the home.
In 1960, we had a product and a code name, then came
hundreds of tests on the product. For instance, we did
safety tests to find out whether it would really work
in the home. (It did.) Could people see the results?
(They did.) How would it hold up during shipping? How would
it withstand heat and cold? We found the answers to all
these questions and more.
By the spring of 1961, we were ready to give our shampoo
a "real" name and start work on the packaging, displays,
advertising, and marketing programs that would introduce
it to the public.
In November 1961, the code name became a brand name:
Head & Shoulders. We were then ready for the most crucial
phase: Marketing the product in a few selected areas. Why
didn't we make it available everywhere in the country?
At Procter & Gamble, no product is sold nationwide until
it has first proven itself successful in limited areas.
Active Ingredients
In all the years of our testing, no ingredient has ever
performed better than Pyrithione zinc, the dandruff control
agent in Head & Shoulders. Pyrithione zinc comprises
approximately 1% of the Head & Shoulders formula.
Pyrithione zinc is able to inhibit the growth of the microorganisms on the scalp which are believed to play a significant role in the cause of dandruff. This ingredient actually remains on the scalp after shampooing, thus continuing to fight the causes of dandruff. Our tests show that regular use of Head & Shoulders is required to keep dandruff flaking under control.
Basically, Pyrithione zinc is an antimicrobial agent that
works especially well on the microbes believed to cause
dandruff. Furthermore, the active ingredient goes straight
to the scalp, where it's needed, and doesn't affect the
hair. Pyrithione zinc is the official chemical name for the
compound, but the structural name is zinc
2-pyridinethiol-1-oxide. The empirical formula
is C10H8N2O2S2Zn and it has a molecular weight of 317.92.
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