Your hair and nails help protect your body. They also keep the temperature of your body steady. Hair color change is one of the clearest signs of aging, and it stems from a pigment called melanin produced by hair follicles. Hair follicles are structures in the skin that make and grow hair. With aging, the follicles make less melanin, and this causes gray hair. Graying often begins in the 30s, with scalp graying typically starting at the temples and extending to the top of the head. Body and facial hair also turn gray, but this happens later than scalp hair. Hair in the armpit, chest, and pubic area may gray less or not at all. Graying is largely determined by your genes, and gray hair tends to occur earlier in white people and later in Asians. Nutritional supplements, vitamins, and other products will not stop or decrease the rate of graying.
Hair thickness changes as you age. Hair is made of many protein strands, and a single hair has a normal life between 2 and 7 years. That hair then falls out and is replaced with a new hair. How much hair you have on your body and head is determined by your genes. Nearly everyone has some hair loss with aging, and the rate of hair growth slows. Hair strands become smaller and have less pigment, so the thick, coarse hair of a young adult eventually becomes thin, fine, light-colored hair. Many hair follicles stop producing new hairs. Men may start showing signs of baldness by the time they are 30 years old, and many men are nearly bald by age 60. A type of baldness related to the normal function of testosterone is male-pattern baldness; hair loss may be at the temples or the top of the head. Women can develop a similar type of baldness as they age, called female-pattern baldness, with less dense hair and visible scalp. As you age, your body and face also lose hair, with facial hair sometimes becoming coarser on the chin and around the lips, and men may see longer and coarser eyebrow, ear, and nose hair.
Your nails also change with age: they grow more slowly, may become dull and brittle, yellowed and opaque, and nails (especially toenails) may become hard and thick. Ingrown toenails may be more common. Lengthwise ridges may develop in the fingernails and toenails. Check with your provider if nails develop pits, ridges, lines, changes in shape, or other changes, as these can be related to iron deficiency, kidney disease, and nutritional deficiencies.
Why hair stops growing or grows more slowly
The hair growth cycle has four parts: Anagen (active growth) lasting about 2 to 8 years, Catagen (transition) lasting 4 to 6 weeks, Teagen (resting) lasting 2 to 3 months, and Exogen (shedding) lasting 2 to 5 months with daily shedding of 50-100 hairs as new ones grow in. Beyond this cycle, several factors influence growth rate: genetics, age, hormones, stress, immune function, and other health conditions. Genetics play a key role in both male-pattern and female-pattern hair loss. Age-related hormonal changes, thyroid function, and systemic health conditions can affect hair growth and density. Stress can cause hair loss by releasing cortisol, and immune dysfunction can trigger alopecia areata or cicatricial alopecia. Medications, including chemotherapy, can also impact hair growth.
As you age, hair growth typically slows and density decreases. The lifetime of a hair remains about seven years, but the growth period shortens with age, leading to thinning and baldness for many. In AMAB individuals, signs of baldness may appear by age 30, with about half affected by age 50; AFAB individuals can also experience thinning and pattern hair loss. Hair color changes due to reduced melanin production in follicles, leading to gray and white hair. Hair thickness often declines, and hair strands can become finer and weaker, increasing fragility and breakage. Some people notice one side of the head growing more slowly than the other due to slightly different blood supply or habitual sleeping positions.
Managing aging hair and signs of aging in hair
To help manage aging hair, dermatology associations emphasize tailoring care to hair type and reducing damage from styling. Recommendations include washing as needed, conditioning to maintain moisture, using wide-tooth combs, and avoiding excessive heat. Limiting daily heat styling and applying heat protectants can prevent damage. Choosing appropriate hair products and professional dyeing advice is advised for those coloring hair. For hair loss concerns or patchy hair loss, consult a health professional to identify underlying causes such as alopecia areata, thyroid issues, or hormonal changes.
There are several approaches to addressing hair loss or thinning, including topical minoxidil, oral finasteride (for some cases), hair transplantation, and scalp micropigmentation. Cosmetic options like hair extensions, wigs, and hair concealers can help achieve a fuller appearance. Dietary and lifestyle factors matter: ensure adequate protein intake, vitamins and minerals (where deficiencies are identified), and a balanced diet. Some people explore plant-based or supplemental options such as saw palmetto, biotin, or other compounds, though evidence varies and medical guidance is recommended. Always discuss medications and treatments with a dermatologist before starting therapy.
Understanding The Hair Growth Cycle | Adam Explains
Practical steps for maintaining healthier hair with age
- Identify your hair type and adjust products to suit straight, wavy, or curly hair and thickness.
- Shampoo with purpose: wash scalp to remove buildup but avoid over-washing to prevent dryness.
- Condition to moisturize, detangle, and reduce pull on hair during brushing.
- Limit heat exposure from dryers, curling irons, and flat irons; use heat protection when needed.
- Consider professional help for coloring to choose safe dyes and application methods.
- Incorporate protein-rich foods and a multivitamin if needed to support hair follicles.
- Monitor medications with your doctor, as some can affect hair growth or loss.
- If you notice sudden patchy hair loss or receding hairlines, seek medical evaluation to rule out underlying conditions.
What to watch for and when to seek care
Hair can stop growing or slow due to age, genetics, hormones, or stress. Not all individuals experience the same pattern or rate of change, and aging hair can still be cared for with appropriate strategies. If you notice sudden or patchy hair loss, receding hairline, or unusual changes, it’s important to consult your dermatologist or primary care provider for evaluation and personalized treatment options.