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On one hand, consumers have become more conscious that a healthy scalp is the foundation of beautiful hair, and that environmental stressors can contribute to scalp issues.3, 4 On the other hand, brands are constantly innovating and adding to their product portfolios. Samuel Gourion-Arsiquaud, Ph.D., of the TRI Princeton research center, reports that skin care brands extending into scalp care and expanding on current claims, plus booming interest in hair growth products are some factors fueling this category’s growth.5 Reflecting this, the research center, known historically for its focus on hair material science, has in the last decade expanded beyond testing hair tresses to develop methodologies to study the skin, nails and scalp.
