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- W3178049600 abstract "The success of 5α-reductase inhibitors in the 1990s vindicated the role of androgens and cast doubt on the role of diet in androgenetic alopecia (AGA). However, poor glucose control and high cholesterol are now recognised as comorbidities, which are salient characters of the ‘western diet’. In glucose potentiated hair loss, continuous monosaccharide flux to the liver promotes the polyol pathway, causing fatty liver and attenuating synthesis of sex hormone binding globulin, accommodating the increased ratio of dihydrotestosterone (DHT) to testosterone. The scalp of the balding phenotype is characterised by overactive PPAR-γ receptors, increased fatty acid synthesis, enlarged sebaceous glands and sebum secretions. Sebum feeds lipophilic bacteria, such as Propionibacterium acnes, which augment the expression of prostaglandin-type (PGD2 & 15d-PGJ2) ligands of PPAR-γ and increase local insulin sensitivity via Akt/mTOR pathways. In hyperglycaemic events the androgen dependent polyol pathway depletes glucose and generates purine by-products that antagonise adenosine receptors. Mitochondrial reactive oxygen species accumulate, and ATP levels reduce, slowing gluconeogenesis in the outer root sheath keratinocytes of the hair follicle. Furthermore, the current commentary suggests that an important mineral in hair health is magnesium, which is relevant to both glucose and cholesterol potentiated hair loss. Magnesium deficiency not only reinforces insulin resistance, but in cholesterol potentiated hair loss, local magnesium dependent monooxygenase enzymes that metabolise cholesterol and vitamin D are impaired. Furthermore, magnesium deficient muscles at the occipital and temporal region of the skull create mechanical strain against the galea aponeurotica. Taking all of this into consideration, treatment options for androgenetic alopecia should include a low cholesterol and low glycaemic index diet, improved glucose control, and fortification with magnesium. Furthermore, the current narrative does not endorse severe caloric restriction for obvious health reasons." @default.
- W3178049600 created "2021-07-19" @default.
- W3178049600 creator A5041548809 @default.
- W3178049600 date "2021-10-01" @default.
- W3178049600 modified "2023-09-27" @default.
- W3178049600 title "The ‘bald’ phenotype (androgenetic alopecia) is caused by the high glycaemic, high cholesterol and low mineral ‘western diet’" @default.
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