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News
Industry Insiders
Wellness
Spas
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Business
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IECSC
Magazine
Resources
Contest
Downloadable Guides
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American Salon
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European Skincare
Wellness
What Is Quintessence? Yon-Ka Paris' Katherine Tomasso Explains
Yon-Ka Paris' national director of education, Katherine Tomasso, explains the secret behind the brand's iconic Quintessence formula, live from Spatec.
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