Do you believe there is a link between lack of sunlight and the speed of mpb? I’m not talking about synthetic vitamin d supplements here. I’ve noticed people who tan do not bald and people in southern sunnier climates do not bald as much as those in the northeast united states and northern europe. I know age, lifestyles, and ethnicity are factors but could sunlight reduce the speed people lose hair?? I truly believe there is a link.
I don’t believe male pattern baldness is associated with sunlight, vitamin D, or geographic/climate variations. Perhaps people in sunny climates (particularly what I see here in Southern California) pay more attention to their physical appearance/ Maybe what you are noticing are good hair transplants or wigs on these people? I really cannot say for sure and I’m struggling to find statistics that show a breakdown of balding population by location/region. I’d be curious to see if what you’re noticing has any merit.
By the way, have you tried to correlate female breast sizes with climate and geographic locations? I’d guess women in sunny climates have a higher incidence of breast augmentation than women in colder climates where there is more skin cover.