The reason? Sebum is produced by the sebaceous glands, influenced primarily by hormones and individual physiology—not the number of times you wash your hair.
Are 3-5 washes per week appropriate?
This frequency helps:
remove sebum and residues of styling products
hair follicles can “breathe” better
reduce the risk of irritation
control unpleasant odors
limit the growth of bacteria and fungi, especially in hot weather and when sweating
Of course, everyone’s scalp has different needs. People who exercise daily, live in a hot climate, or wear a helmet/hat at work may need to wash their hair more frequently.
Experts emphasize: routine should be individual.
The Hair Surgery Institute explains that the ideal washing frequency varies depending on:
hair type (oily, dry, normal, curly)
condition of the scalp
daily activities
type of styling products
preferred hairstyle (tail, bun, loose hair)
Therefore, there is no “universal formula” – it is important to monitor your own needs.
What are the risks of over-diluting shampoo?
see next page
