The Complete Handbook of Shampoo & Conditioner

The business opportunities section alone justified buying this. I've been reselling hair products for three years and had no systematic way to evaluate them—now I do. The neutral tone is refreshing; it's clear the author isn't pushing any particular brand. One quibble: more case studies of actual salon problems and solutions would've helped.

Good foundational material on how shampoo and conditioner actually work chemically—I appreciated the explanation of surfactant classes and why pH matters more than marketing suggests. My only complaint is that Chapter 1 could've gone deeper into the difference between anionic and amphoteric surfactants, since that distinction really shapes product selection. Overall solid reference.

As a salon manager buying for multiple locations, I found the specification comparison tables and sourcing section invaluable. The chapter on cost-per-use analysis gave me a framework I didn't have before. Would've liked more on how to train stylists on application technique, but this is still the most practical guide I've found.

Finally—a shampoo and conditioner book written for people who actually need to know this stuff, not consumers looking for product recommendations. The chemistry is accessible without being dumbed down, the examples are real (salon pH issues, buildup problems, private-label opportunities), and there's almost no marketing speak. This is exactly what I needed to develop a product line.

Really helpful for understanding specifications and choosing products for different hair types. The troubleshooting chapter solved a client issue I'd been struggling with. Only minor critique: I would've liked a bit more detail on water quality and how it affects performance, since that's a huge issue in our area.

Excellent reference for a beauty distributor. The types-and-specifications chapter is the clearest breakdown of surfactant systems and pH I've read, and the supplier positioning section is accurate and useful. My one wish: deeper dive into private-label manufacturing minimums and lead times, though I understand that varies by supplier.

Useful overall, especially the chemistry and selection sections. But I felt like the book tried to cover too much ground—it would've been stronger if it went deeper into fewer topics instead of touching on everything from formulation to business models. Still worth it if you're a professional, just not as thorough as it could be.