Hair Care

Hair care gets easier when you separate three jobs: keep the fiber you have from breaking, wash often enough that your scalp is comfortable, and notice when thinning is a pattern rather than a missing bottle.

The 80/20 move is to give those jobs priority, and to stop asking a new oil to do a clinician's work. The bottles that matter are the ones you actually use.

Heat and bleach write on the hair you can see

High heat and chemical lightening break the fiber. Less heat, a protectant on the days you do use it, and air-drying when you can, will change breakage more than another serum. You can feel the difference from less heat long before anyone assigns it a percentage.

Wash often enough that your scalp feels comfortable. There is no study in which one magic interval maintains most scalp health. A trim removes split ends you already have. It does not push growth from the scalp, and it is not medicine. If you like the shape, schedule it for the shape.

Pattern loss is common, and it is not a missed conditioner

Androgenetic alopecia is the common patterned thinning. A clinical review puts it at about 50% of Caucasian men by age 50 and about 80% by age 70. Women are affected too, more often after menopause, usually with the front hairline kept and the part widening (StatPearls).

MedlinePlus gives the U.S. scale as about 50 million men and 30 million women, and more than half of men over 50 with some loss (MedlinePlus Genetics). That "about 80% by 70" is how common the pattern is in one population. The useful response is gentler handling of the hair you have, and a clinician if the pattern bothers you.

If the loss is patches, sudden, scarring, or comes with breakage at the scalp, see a clinician. A scrub will not sort that. Pattern loss that bothers you is also a clinician conversation. Approved treatments exist. This page will not dose them.

A growth vitamin can be the wrong direction

A dermatology review of vitamins and hair loss is plain about vitamin A. Too much can contribute to hair loss. For adults, the tolerable upper level they cite for preformed vitamin A is 10,000 IU a day. Beta-carotene from food is a different story. A balanced diet covers what most people need (Almohanna and colleagues, Dermatology and Therapy, 2019).

Iron deficiency can matter, especially for some women, and that is a test, not a guess from a hair ad. The same review does not support biotin as a hair treatment for people who are not deficient, and extra biotin can distort lab tests. Food, not a stack, is the default. The plate is on diet. Skin beside the hairline is a different routine, on skin care. Sleep and the rest of the week still sit under how you feel, on self-care.

Two weeks with a short shelf

Use shampoo, a conditioner you actually like, and heat protection only on heat days. Everything else stays in a box. If the hair feels better, the box was the noise. If a patch appears or a handful comes out, stop the experiment and get it seen. Do not add a vitamin for your hair while you wait.

Sources

• StatPearls, androgenetic alopecia. About 50% of Caucasian men by age 50 and about 80% by age 70. Women more often after menopause, with the hairline often kept.
• MedlinePlus Genetics, androgenetic alopecia. About 50 million men and 30 million women in the United States. More than half of men over 50.
• Almohanna and colleagues, Dermatology and Therapy, 2019. Excess vitamin A can contribute to hair loss. Upper level cited: 10,000 IU a day of preformed vitamin A for adults. Biotin is not supported unless someone is deficient.
• The two-week shelf is a practice, not a treatment plan. This page does not dose medicine.

Treat the fiber and the scalp as different jobs

Conditioner can make the lengths easier to handle, but it does not diagnose scalp disease or change a pattern of growth. Use products according to where they belong, detangle gently, and reduce pulling on wet or fragile hair. A routine that prevents breakage is valuable even when it cannot change the follicle.

Take a clear photo if you are trying to notice gradual change, using similar light and parting. Do not let daily checking turn into a new source of anxiety. Sudden shedding, smooth patches, scalp pain, redness, or scarring deserves clinical attention. The useful next step is the one that identifies the cause, not the one with the loudest promise.