Popular scalp serum actives include caffeine for circulation support, niacinamide for barrier function, salicylic acid for exfoliation, biotin complexes, keratinocyte-supporting peptides, and botanical extracts such as rosemary or peppermint. Your chosen manufacturer should have documented experience handling each active's stability and concentration limits. AJ Cosmo Labs connects you with cosmetic chemists who specialize in scalp-specific formulation.
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