Toxoplasma gondii infection may increase testosterone levels in males.
5 citations
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June 2020 in “Experimental dermatology” Redheaded people may have evolved to efficiently make vitamin D in areas with less sunlight.
December 2019 in “bioRxiv (Cold Spring Harbor Laboratory)” Redheaded people have higher levels of a vitamin D precursor, suggesting red hair may be an adaptation for better vitamin D synthesis in areas with less sunlight.
10 citations
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May 2017 in “Symmetry” Higher androgen levels are linked to less asymmetry in !Kung San males.
February 2025 in “Iraqi Journal of Science” PCOS patients have higher LDH and lower cortisol, dopamine, zinc, and vitamin D3, which may contribute to their symptoms and obesity.