Hair serum is a silicone-based protection remedy ... especially if you have a sensitive scalp. -Allergic reactions: This is less common, but some people can be allergic to specific oils or ...

Ulo’s Hair Growth Serum for men and women is a topical solution that combines well-researched natural ingredients for hair growth in humans, setting it apart from some competitors. Clinically ...

Act+Acre’s Cooling Scalp Serum relieves one editor’s itchy scalp instantly, and keeps her dry flakes at bay for weeks. PEOPLE ...