Hair-washing routines should change as you age.

Experts say scalp oil production and hair strength decline with age, so many people naturally need less frequent washing and milder products.

Experts told Newsweek that continuing the same hair-washing routine for decades can overlook biological changes in scalp and hair that come with age. Sebum production typically peaks in the late teens and twenties and then falls, which can make the scalp drier and more sensitive. Hair fibers tend to become finer and more fragile over time, and follicle changes can reduce overall density. Those shifts mean the scalp and hair may tolerate aggressive cleansing and styling less well. Key points: - Sebum output rises in early adulthood and then steadily declines, which can increase scalp dryness and trans-epidermal water loss. - Individual hair fibers often become finer and more prone to breakage as the cuticle becomes more fragile with age. - Hormonal shifts, including perimenopause and menopause, oxidative stress, and nutrient absorption can alter follicle behavior; the article notes 40–60% of women may experience some thinning. - Experts reported that many people find they need shampoo less frequently with age; examples mentioned include washing every two to three days for mature scalps and a suggested maximum of seven to ten days between washes for most people. - The article notes other medical issues such as thyroid disorders, iron deficiency, and autoimmune conditions can affect scalp and hair, and that persistent shedding, pain, or itching may reflect underlying causes. Summary: The change in sebum production, hair shaft strength, and follicle activity means scalp health becomes a greater focus as people age. Experts discussed shifting from aggressive cleansing toward milder, hydrating formulas and adjusted washing frequency, and they highlighted that medical or hormonal factors can also affect hair; specific individual recommendations were not specified in detail.