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October 2020 in “eLife” Higher testosterone levels can increase the risk of certain diseases like type 2 diabetes in women and prostate cancer in men, but can also protect against autoimmune diseases and hair loss. It also affects body fat and bone density.
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October 2016 Genetic hair disorders can indicate other hidden health problems.
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May 2008 in “Neuroscience” Finasteride given to baby rats causes anxiety-like behavior and worsens learning from punishment in adult rats.
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March 2012 in “International Journal of Andrology” Prenatal pesticide exposure may cause earlier breast development in girls.
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March 1975 in “Journal of steroid biochemistry/Journal of Steroid Biochemistry” The study concludes that a genetic mutation in TFM mice leads to reduced androgen receptor activity, affecting the body's response to male hormones.
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January 2017 in “Journal of Pigmentary Disorders” Genetics, stress, and health issues can cause early hair greying, which affects self-esteem, and there's no cure, only hair dye.
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June 2016 in “The Cerebellum”
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November 2022 in “Nature Medicine” Genetic variations greatly affect individual metabolism and can impact health and disease risk.
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December 2012 in “Behavioural Brain Research” Changing Allopregnanolone levels in newborns affects adult behavior and anxiety.
Increased free testosterone can lead to stronger bones and less body fat but also higher risks of prostate cancer, hair loss, spine issues, and high blood pressure.
June 2024 in “The American journal of psychiatry” Schizophrenia risk genes may affect early brain development, contributing to the disease.
April 2025 in “Brazilian Journal of Hair Health” Early exposure to sexualized content and poor lifestyle choices may lead to early hair loss.
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October 2014 in “Cell death and disease” FoxN1 overexpression in young mice harms immune cell and skin development.
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June 2002 in “Veterinary Dermatology” Prenatal retinoic acid exposure increased cell proliferation in mouse hair follicles without affecting their development.
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May 2023 in “Nanomaterials” Titanium dioxide nanoparticles may harm the male reproductive system.
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March 2019 in “JAT. Journal of applied toxicology/Journal of applied toxicology” PFOS exposure disrupts hormone levels and enzyme activities in juvenile frogs, affecting males and females differently.
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January 2017 in “Evolutionary studies” Different human traits like skin color and hair type vary between populations due to genetic adaptations to the environment.
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October 2018 in “Journal of The American Academy of Dermatology” Some skin medications can harm male fertility, but they don't seem to cause birth defects from father's exposure.
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March 2023 in “Chemosphere” Certain pesticides may delay sexual maturity in teenage boys.
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June 2018 in “Cell death and disease” Restoring mitochondrial function in mice reversed their skin wrinkling and hair loss.
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January 2012 in “Nature Reviews Molecular Cell Biology” Stem cell offspring help control their parent stem cells, affecting tissue health, healing, and cancer.
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January 1967 Testosterone slightly improved aging skin, while corticosteroids worsened it.
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Both changes in genes and environmental factors like diet and toxins can significantly affect the growth of skin appendages like hair, but how these factors interact is still unclear.
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August 2020 in “BMC Genomics” Hair greying is mainly influenced by age, with genetics playing a smaller role.
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September 2022 in “Genes & Genomics” Long non-coding RNAs affect feather growth in chickens in ways that don't follow traditional genetic rules.
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