November 2024 in “The Journal of Dermatology” Alopecia areata may be linked to atopic diseases like eczema, asthma, and allergies.
January 2026 in “Medicine” Higher LDL cholesterol may increase the risk of hair loss, while HDL cholesterol does not.
Four genes are linked to alopecia areata, with two increasing risk and two offering protection.
4 citations
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August 2024 in “Skin Research and Technology” The study was retracted.
May 2025 in “Annals of surgical case reports & images.” Certain gut bacteria may protect against hair loss, while others may increase the risk.
April 2024 in “Frontiers in microbiology” Certain gut bacteria may increase or decrease the risk of male pattern baldness.
6 citations
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January 2024 in “International Journal of Dermatology” Certain gut bacteria may cause alopecia areata.
1 citations
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August 2024 in “Skin Research and Technology” There is no causal relationship between androgenetic alopecia and serum uric acid.
4 citations
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June 2024 in “Heliyon” Type 1 diabetes may cause certain autoimmune diseases in Europeans.
1 citations
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November 2025 in “Clinical Cosmetic and Investigational Dermatology” Sleep patterns might be linked to hair loss, but more research is needed.
1 citations
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January 2025 in “Clinical Cosmetic and Investigational Dermatology” Higher levels of certain proteins may increase or decrease rosacea risk.
December 2025 in “Journal of Cosmetic Dermatology” Finasteride does not increase the risk of depression or suicide.
February 2025 in “Clinical Cosmetic and Investigational Dermatology” Higher fasting insulin levels increase the risk of androgenetic alopecia.
Gut bacteria pathways may help treat hair loss in obese people.
4 citations
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August 2019 Higher free testosterone levels can increase bone density and decrease body fat but may raise the risk of prostate cancer, hair loss, and benign prostate enlargement.
Certain gut bacteria may protect against or increase the risk of hair loss.
October 2025 in “Skin Research and Technology” June 2025 in “Skin Research and Technology”
March 2024 in “PLoS medicine” Physical activity, height, and smoking affect prostate cancer risk.
April 2025 in “Journal of Cosmetic Dermatology” Managing lipids may help treat hair loss.
November 2025 in “DOAJ (DOAJ: Directory of Open Access Journals)” Insomnia may increase alopecia areata risk, but more research is needed.
Certain plasma proteins and genes are linked to obstructive sleep apnea, suggesting potential new treatments.
November 2025 in “Figshare” SQSTM1 is linked to increased risk of alopecia areata.
308 citations
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December 2018 in “PLOS Genetics” The research found that PCOS has common genetic factors regardless of how it is diagnosed and is linked to metabolic and reproductive issues.
2 citations
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September 2024 in “Skin Research and Technology” The study initially suggested a genetic link between thyroid issues and hair loss.
April 2025 in “International Journal of Dermatology and Venereology” Androgenetic alopecia may cause schizophrenia, but schizophrenia does not cause androgenetic alopecia.
April 2024 in “Prostate international” Male pattern baldness does not cause an increased risk of prostate cancer.
2 citations
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October 2023 in “Frontiers in Immunology” People with rheumatoid arthritis have a higher risk of developing alopecia areata.
August 2024 in “Clinical Cosmetic and Investigational Dermatology” Hypothyroidism may cause certain types of hair loss.
3 citations
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July 2024 in “Skin Research and Technology” Asthma may increase the risk of alopecia areata.