1 citations
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April 2016 in “CRC Press eBooks” Skin aging reflects overall body aging and can indicate internal health conditions.
12 citations
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March 1981 in “International Journal of Dermatology” External factors like certain shampoos, bacterial infections, and parasites might cause hair defects similar to genetic conditions.
1 citations
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December 2020 in “International journal of molecular sciences” External factors can cause skin cancer cells that usually don't spread to grow and form tumors in mice.
69 citations
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May 2016 in “General and Comparative Endocrinology” External factors can significantly affect hair cortisol levels, so it's not always a reliable stress marker.
June 2025 in “Universal library of medical and health sciences.” External factors like pollution, stress, and poor nutrition can negatively affect hair growth.