Sarah Jenkins has followed hair care from drugstore shelves to salon chairs for over a decade. At Safi Natura she writes the hair guides: she tests products at home, keeps a wash-day log, and cuts any sentence she cannot back with a source.

Articles by Sarah Jenkins

• Hair Mask for Damaged Hair: How Often, How Long, What Helps
• Best Clarifying Shampoo for Curly Hair and How Often to Use It
• Clarifying Shampoo: What It Does, How Often, and Who Needs It
• Best Shampoo for Damaged Hair: Repair Truth Guide
• Biotin Shampoo: What It Can and Cannot Do for Hair