Hair Science
Science-based answers to the most common questions about detergent-free hair care, scalp health, ingredient transparency, and New Wash.
All Questions
How It Works
Adjustment Period
Troubleshooting
- New Wash worked great for years and suddenly seems less effective. Why?
- I have dandruff or flaking. Will New Wash help or make it worse?
- My hair feels dry or brittle since switching. What's happening?
- My scalp is itchy since switching. Is something wrong?
- I'm using enough product but hair still feels greasy. Could it be rinsing?
- How much New Wash should I be using?
- What information should I gather before troubleshooting a New Wash performance issue?
Hair Type
- I have a keratin treatment. Is New Wash safe?
- My hair is damaged from bleach, coloring, or chemical processing. Will New Wash help?
- I have thick or coarse hair. Which formula is right and what should I expect?
- I have grey or silver hair. What can I expect from New Wash?
- I have curly hair. Is New Wash appropriate, and how does it interact with the Curly Girl Method?
- I have fine or thin hair. Will New Wash weigh it down or make it worse?
Formula Selection
Scalp Health
Ingredients
- Are Hairstory products gluten-free?
- Does New Wash contain ylang ylang? Do you have products without it?
- Are all Hairstory products vegan?
- Why does New Wash contain alcohols - aren't those drying?
- A customer is badly allergic to methylisothiazolinone (MI) - is it in any products?
- Why does the US version contain phenoxyethanol while the UK version does not? A client used the Yuka app and it was rated "Bad" - how do I respond?
- Where can I find a complete ingredient list for your products?
- Does Hairstory have an EWG-approved version? Are there plans to release one?
Fragrance
Hair Care Claims
- My hairdresser always told me to wash less often. Why - and does that still apply with New Wash?
- What does "clinically proven" or "dermatologist tested" actually mean on a hair care label?
- What do "natural", "clean beauty", and "chemical-free" actually mean on hair care labels?
- How do I evaluate hair care marketing claims? What questions should I ask about any product?