Prostaglandin D2 levels triple in balding scalps. Smoking increases the risk of severe baldness nearly twofold.
Key Takeaways
- DHT levels 3-5 times higher in balding scalps due to 5-alpha reductase.
- Smoking increases risk of severe baldness by 1.8-fold (OR=1.79).
- BMI >30 kg/m² associated with 44% higher baldness risk.
- Androgenetic alopecia is polygenic with heritability estimated at 80%.
- The AR gene on X chromosome accounts for 40% of male pattern baldness variance.
- Variants in 287 loci associated with male pattern baldness identified in GWAS.
- Approximately 50% of Caucasian men experience noticeable hair loss by age 50.
- Male pattern baldness affects about 80% of men by age 70.
- In the US, 42% of men aged 18-49 have moderate to extensive hair loss.
- Male pattern baldness linked to 32% higher depression risk.
- 40% of balding men report decreased self-esteem.
- Alopecia areata patients have 50% higher anxiety rates.
- Finasteride reduces DHT by 70% and halts progression in 86% of men.
- Minoxidil 5% solution regrows hair in 40% of users after 48 weeks.
- Hair transplantation success rate 90-95% with FUT/FUE techniques.
Smoking, obesity, and metabolic health strongly drive hair loss risk, while genetics and DHT levels shape severity.
Related reading
01 · Category
Causes and Risk Factors22 stats
01
DHT levels 3-5 times higher in balding scalps due to 5-alpha reductase.
02
Smoking increases risk of severe baldness by 1.8-fold (OR=1.79).
03
BMI >30 kg/m² associated with 44% higher baldness risk.
04
Hyperinsulinemia doubles the risk of vertex baldness in men.
05
Metabolic syndrome increases female pattern hair loss risk by 2.3 times.
06
Poor diet low in biotin causes diffuse hair loss in 38% of cases.
07
Stress-induced telogen effluvium affects 30% of acute stress patients.
08
Iron deficiency contributes to hair loss in 72% of female telogen effluvium cases.
09
Hypertension risk 1.48 times higher in moderate to severe baldness.
10
Tight hairstyles cause traction alopecia in 24% of users over 5 years.
11
Vitamin D deficiency (<20 ng/ml) linked to alopecia areata in 81% of patients.
12
Anagen effluvium from chemotherapy occurs in 65-100% of patients.
13
Autoimmune factors cause 90% of alopecia areata cases.
14
Prostaglandin D2 levels 3-fold higher in balding scalps.
15
Oral contraceptives trigger hair loss in 3-11% of users.
16
Hypothyroidism causes diffuse alopecia in 40% of untreated cases.
17
Coronary heart disease risk 44% higher in frontal baldness.
18
Zinc deficiency associated with 68% of alopecia areata patients.
19
Scalp infections like tinea capitis cause alopecia in 20% of pediatric cases.
20
Alcohol consumption >30g/day increases baldness risk by 2-fold.
21
PCOS increases female pattern hair loss by 5-10 times.
22
UV radiation accelerates hair graying and loss by 30% in exposed scalps.
Interpretation
Causes and Risk Factors Interpretation
While male pattern baldness often gets blamed on genetics, it's increasingly clear that your body's internal environment—from high stress and poor diet to smoking and metabolic disorders—acts as a powerful accomplice, turning up the biochemical volume on hair loss.
02 · Category
Genetics and Heredity26 stats
01
Androgenetic alopecia is polygenic with heritability estimated at 80%.
02
The AR gene on X chromosome accounts for 40% of male pattern baldness variance.
03
Variants in 287 loci associated with male pattern baldness identified in GWAS.
04
Paternal grandfather's baldness increases son's risk by 2.5 times.
05
EDAR gene variant rs17824752 strongly linked to Asian baldness.
06
FOXC1 gene mutations cause anterior segment dysgenesis and alopecia.
07
Heritability of female pattern hair loss is 73% in twins studies.
08
HLA-DRB1*11:04 allele increases alopecia areata risk by 3-fold.
09
20% of male pattern baldness risk from maternal inheritance via AR gene.
10
CAG repeat length in AR gene inversely correlates with baldness severity (r=-0.2).
11
GWAS identified 71 susceptibility loci for androgenetic alopecia.
12
Twins studies show 81% concordance for severe male baldness in monozygotic twins.
13
IRF4 gene polymorphism rs12821256 associated with early-onset baldness.
14
PTCH1 mutations cause nevoid basal cell carcinoma syndrome with alopecia.
15
63 novel loci identified for female pattern hair loss in recent GWAS.
16
Maternal inheritance pattern stronger in female pattern hair loss (OR=3.9).
17
HOXC13 gene truncating mutations cause pure hair and nail ectodermal dysplasia.
18
389 loci now linked to male androgenetic alopecia susceptibility.
19
LIPH gene variant rs11551765 explains 10% of Japanese baldness variance.
20
GATA6 gene involved in woolly hair hypotrichosis.
21
U2HR gene mutations cause congenital hypotrichosis simplex.
22
DES gene variants linked to woolly hair and cardiomyopathy.
23
HR gene mutations responsible for Marie Unna hereditary hypotrichosis.
24
SOSTDC1 gene implicated in androgenetic alopecia pathways.
25
82% genetic risk score predicts baldness progression accurately.
26
TCHH gene polymorphisms associated with monilethrix-like hair.
Interpretation
Genetics and Heredity Interpretation
While you can largely thank your ancestors for your hairline's fate, don't be too quick to solely blame your maternal grandfather, as a small army of your own genes is conspiring in a surprisingly predictable betrayal.
03 · Category
Prevalence and Epidemiology30 stats
01
Approximately 50% of Caucasian men experience noticeable hair loss by age 50.
02
Male pattern baldness affects about 80% of men by age 70.
03
In the US, 42% of men aged 18-49 have moderate to extensive hair loss.
04
Female pattern hair loss affects up to 40% of women by age 70.
05
Alopecia areata prevalence is 1 in 1,000 people worldwide.
06
In Japan, male pattern baldness prevalence is 26.78% in men aged 30-59.
07
25 million men and 40 million women in the US suffer from hereditary hair loss.
08
By age 35, about 66% of men show some degree of male pattern baldness.
09
In Korea, 14.1% of men aged 20-65 have androgenetic alopecia.
10
Prevalence of frontal fibrosing alopecia increased from 3.1% in 1997 to 11.3% in 2014 in UK women.
11
16% of men aged 18-29 report hair loss in surveys.
12
Lichen planopilaris affects 1-2% of alopecia cases in dermatology clinics.
13
In China, 19.9% of men over 25 have male pattern baldness.
14
Traction alopecia is common in 30-40% of African American women using tight hairstyles.
15
Central centrifugal cicatricial alopecia prevalence is 2.7% in African American women.
16
In Europe, 30-50% of men over 50 have vertex baldness.
17
Alopecia areata totalis affects 5-10% of alopecia areata patients.
18
2-3% of the world's population experiences some form of alopecia areata.
19
Male pattern hair loss starts before age 40 in 60% of affected men.
20
In India, 58% of men over 30 have androgenetic alopecia.
21
Discoid lupus erythematosus causes scarring alopecia in 50-60% of cases.
22
10% of postmenopausal women experience female pattern hair loss.
23
In Australia, 39% of men aged 18+ have male pattern baldness.
24
Folliculitis decalvans accounts for 3-9.3% of primary cicatricial alopecias.
25
70% of Japanese men with baldness have the AA genotype at EDAR.
26
Hair loss prevalence in men increases from 20% at 20 to 50% at 50 years.
27
In the UK, 6.5 million men under 50 have male pattern baldness.
28
1 in 3 Asian men experience hair thinning by age 30.
29
Acne keloidalis nuchae leads to alopecia in 45-70% of cases.
30
Globally, 200 million people suffer from androgenetic alopecia.
Interpretation
Prevalence and Epidemiology Interpretation
While the bald truth is that hair loss spares no one, the sheer scale of these numbers—from half of all men to tens of millions worldwide—proves we're all just clinging to our scalps by a collective, thinning thread.
More related reading
05 · Category
Treatments and Therapies24 stats
01
Finasteride reduces DHT by 70% and halts progression in 86% of men.
02
Minoxidil 5% solution regrows hair in 40% of users after 48 weeks.
03
Hair transplantation success rate 90-95% with FUT/FUE techniques.
04
Low-level laser therapy improves hair density by 39% in 26 weeks.
05
Dutasteride 0.5mg superior to finasteride, regrowth in 96% vs 80%.
06
PRP injections increase hair count by 30% after 3 sessions.
07
Topical finasteride reduces scalp DHT by 68-75% with less systemic effects.
08
JAK inhibitors induce regrowth in 60% of severe alopecia areata cases.
09
Microneedling with minoxidil boosts efficacy by 50% in trials.
10
Stem cell therapy shows 29% increase in hair density in phase II trials.
11
Oral minoxidil 5mg regrows hair in 90-100% of female pattern loss.
12
Botulinum toxin injections reduce PGD2 and improve density by 18%.
13
Spironolactone 200mg/day stabilizes loss in 74% of women.
14
Follicular unit extraction grafts survive at 93% rate long-term.
15
Baricitinib achieves SALT score ≤20 in 36% of alopecia areata patients.
16
Ketoconazole shampoo reduces DHT by 17% and inflammation.
17
Nutritional supplements with biotin improve hair in 91% of deficient patients.
18
LED therapy at 655nm increases anagen hairs by 51%.
19
Exosome therapy promotes 28% hair growth in androgenetic alopecia.
20
Topical clascoterone reduces scalp DHT by 80% in phase II.
21
Cryotherapy for alopecia areata shows 60% response rate.
22
Bimatoprost 0.03% increases eyelash growth but limited scalp effect (20%).
23
Multi-therapy (minoxidil+finasteride+laser) yields 94% improvement.
24
Ruxolitinib cream induces regrowth in 75% of patchy alopecia areata.
Interpretation
Treatments and Therapies Interpretation
Taken together, these statistics suggest that fighting baldness is less about finding a single magic bullet and more about assembling the right combination of pharmaceutical and procedural artillery, where patience and a multi-fronted strategy become your best hope for holding the line and even reclaiming lost ground.
Reference
Cite This Report
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APA
Samuel Norberg. (2026, February 13). Baldness Statistics. Gitnux. https://gitnux.org/baldness-statistics
MLA
Samuel Norberg. "Baldness Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/baldness-statistics.
Chicago
Samuel Norberg. 2026. "Baldness Statistics." Gitnux. https://gitnux.org/baldness-statistics.
Sources & references
10 datasets cited across this report · attribution is report-level