October 2023 in “Acta dermato-venereologica” Minoxidil and platelet-rich plasma can help turn thin hair into thicker hair in male pattern baldness.
November 2015 in “Hair transplant forum international” This abstract discusses a randomized trial comparing rosemary oil and minoxidil 2% for treating androgenetic alopecia, but it reports no new clinical results; the authors mention ongoing research.
November 2022 in “Journal of Investigative Dermatology” This study suggests that vellus to terminal hair follicle reconversion can occur in male pattern androgenetic alopecia using an in vivo model with minoxidil and platelet-rich plasma treatment.
In this study conducted at Saveetha Dental College, researchers found that the severity of male androgenetic alopecia, as graded by Norwood's classification, increased with age, although other factors such as genetic or hormonal influences were not assessed.
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December 2004 in “BMC Public Health” This study found that trained observers using the Hamilton-Norwood classification were very reliable in assessing balding patterns, while men's self-assessments were moderately accurate compared to observers.