LUSTROUS LOCKS

Important Health and Haircare Note

This book is intended as a general educational guide to hair 

and scalp care. It is not medical advice, diagnosis or treatment 

and is not a substitute for assessment by a GP, dermatologist or 

other appropriately qualified healthcare professional.

Hair loss, scalp irritation, flaking, itching and changes in hair 

condition can have many causes. Some are mainly cosmetic; 

others may be associated with skin conditions, nutritional 

deficiencies, illness, medication, inherited hair loss or other 

health factors.

Seek appropriate medical advice if you are concerned about 

hair loss, particularly where the change is sudden, substantial, 

patchy, persistent or accompanied by significant scalp symptoms.

Hair dyes, essential oils and other cosmetic ingredients can 

cause irritation or allergic reactions in some people. Follow 

product instructions, warnings and recommended testing 

procedures. Severe allergic reactions require urgent medical 

attention.

References to individual ingredients, products or techniques 

are educational rather than personal recommendations. What 

suits one person’s hair or scalp may not suit another.

Research in cosmetic science and dermatology continues to 

develop. The information in this edition reflects sources checked 

during preparation of the 2026 edition.