The Growth Shampoo blog

One new article every day on ingredients, routines and the research behind them.

• Saw Palmetto Shampoo: What the Studies Actually Tested2026-11-04

  Saw palmetto is in many thinning-hair shampoos. Here is what the topical studies tested, why that matters for a rinse-off product, and which shampoos contain it.

• Ketoconazole Shampoo for Hair Loss: What the Research Shows2026-11-04

  Why ketoconazole shampoo shows up in so many hair-loss routines, what the main studies measured, and how to choose between Nizoral and Regenepure DR.

• Caffeine Shampoo: Does It Reach the Follicle in Two Minutes?2026-11-04

  The key study on caffeine shampoo measured absorption, not hair growth. Here is what it found and why contact time is the part you control.