SHAMPOO SCIENCE ENGLISH

THE ENGLISH GUIDE TO HAIR & SCALP

Look beyond the claims.
Choose for yourself.

A plant-science researcher explains how to look at ingredients, hair and scalp fundamentals, and your own observations before choosing a shampoo.

Learn the five lenses View the Japanese book
Cover of the Japanese book Shampoo Maigo, Kyo de Sotsugyo JAPANESE BOOK
Plant scienceAn expert perspective
40+ yearsExperience in plant research
Product-neutralA framework for your own decisions

WHY SHAMPOO SCIENCE

Not one “correct” product.
A better way to choose.

Expensive, natural, popular—none of these labels alone can tell you whether a shampoo suits your hair and scalp.

Shampoo Science does not prescribe a particular product. It helps you understand labels, basic hair and scalp concepts, and the changes you observe after use.

FIVE LENSES

Five ways to read beyond the front label.

Rather than sorting ingredients into a simple “good” or “bad” list, consider their purpose, the whole formula, and how you use it.

01

The formula base

Start with the base of the formula and the ingredients responsible for cleansing. Look at the formulation as a whole instead of judging it by one highlighted ingredient.

02

Surfactants

Consider more than foam or the immediate feeling of cleanliness. Frequency, amount, rinsing, and the current condition of your hair and scalp all matter.

03

Plant extracts and oils

“Plant-derived” is not a complete answer. Ask why an ingredient is included and what role it plays in the overall product.

04

Preservatives, fragrance, and carry-over

Understand how a product maintains quality and how fragrance shapes the experience. Sensitivity varies, so your own observations remain important.

05

The hair barrier and pH

Look beyond the wash itself. Dryness, friction, manageability, and scalp discomfort after washing can all inform your next decision.

OBSERVE BEFORE YOU DECIDE

Change one thing at a time.

If you change several parts of your routine at once, it becomes difficult to tell what made a difference. Keep the comparison small and put safety first.

  1. 01

    Record your starting point

    Note dryness, itching, oiliness, friction, or other relevant observations before switching.

  2. 02

    Keep conditions comparable

    Avoid large changes in amount or washing method while you are observing a new product.

  3. 03

    Stop if problems occur

    Discontinue use if you experience a strong reaction. Seek appropriate medical advice if symptoms persist.

The goal is not to keep searching for a universal shampoo.
It is to understand your own hair and scalp.

ABOUT THE AUTHOR

Dr. Shahran Mesri

PhD in Plant Biotechnology

Dr. Mesri earned a master's degree in agriculture from Mississippi State University and a doctorate in plant biotechnology from the University of Tokyo, followed by three years of postdoctoral research there. For more than four decades, he has worked with herbs and plants in the development of health foods and organic cosmetics.

INSIDE THE JAPANESE BOOK

Shampoo Confusion Ends Today

An explanatory English rendering of the Japanese title 『シャンプー迷子、今日で卒業』. The book itself is currently presented and sold in Japanese.

View on Amazon Japan
  1. 01
    A brief history of hair careHow today's assumptions developed
  2. 02
    The base of shampooHow to see the whole formula
  3. 03
    SurfactantsThe ingredients responsible for cleansing
  4. 04
    Plant extracts and oilsHow to interpret plant-derived ingredients
  5. 05
    Preservatives and carry-overHow product quality is maintained
  6. 06
    FragranceScent, experience, and individual differences
  7. 07
    The hair barrierUnderstanding what happens after washing
  8. 08
    Observation at homeMoving from claims to your own evidence
Cover of the Japanese book Shampoo Maigo, Kyo de Sotsugyo

START CHOOSING FOR YOURSELF

Build a standard you can use again.

Instead of memorizing advertising claims, learn to look at ingredients, context, and your own observations. The Japanese book is a place to begin.

View the Japanese book

This website and the book provide general educational information only. They do not offer diagnosis, treatment, or individualized product recommendations. If you have symptoms or persistent discomfort, consult an appropriate healthcare professional.