Hair Age
Your hair age is made up of:
Actual hair lifespan
The actual lifespan of a hair is the time it stays on the scalp—from when it starts growing until it naturally falls out. It depends on the hair’s growth cycle and its biological phases.
External factors like sun, heat, chemicals, and friction slowly wear down the hair’s surface. Internal factors like nutrition, stress, hormones, and genetics affect how strong and healthy the hair grows.
Accumulated damage from external & internal factors
What is Hair Age?
Your hair says more than a thousand words.
Hair age refers to the condition and "age" of a hair strand, based on the amount of time it has grown out from the scalp and the cumulative exposure to stressors—such as UV radiation, heat styling, chemical treatments, environmental factors, or mechanical friction.
An older hair typically shows:
Increased structural and moisture loss
A rougher or more porous surface
Greater brittleness
Color changes (e.g., fading in color-treated hair)
Reduced shine and elasticity
Factors
Your hair age can be influenced by various factors.
Growth duration: Hair grows about 0.5 inches (1–1.5 cm) per month.
Time / Hair Length
A 12-inch strand is around 2 years old.
Longer hair = biologically older and usually more damaged.
Heat styling: Flat irons, curling wands, blow dryers.
Heat Exposure
Frequent heat exposure dries out the hair and damages the cuticle.