These are my thoughts on the causes of hair loss - another user posted this video on a thread of mine which I found very interesting - credit to @emac for posting this:
He address in the video the 2 things that people seem to really question in hair loss
- the horseshoe hair loss pattern that tends to be followed
- as well as that some people just seem to be immune to hair loss no matter what they do
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In the video I interpret as Skeletal Class 2 structures are the most prone to hair loss since the maxilla protrudes on the mandible so what ends up happening is the mandible ends up occluding on the Superficial Temporal Artery - blocking blood flow partially to the frontal areas of the skull (in the diagram if you notice the STA artery on the left side reaches the front part of the skull) - for skeletal class 1 and skeletal class 3 skulls since the mandible is more forward it makes the person less likely to have the mandible occlude on the STA
The right side of the STA which goes to the back of the skull (the donor site for hair surgery) never seems to go bald in anyone - that is the most interesting part I find - looking at the diagram it would make sense that the frontal part of the skull would be the part to begin losing hair if the mandible was occluding on the artery
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This is an example he utilizes for complete occlusion of the STA - going fully bald
for partial occlusion of the STA - only going bald in the frontal region
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But then there is other points that users brought up which is high metabolism/low gut serotonin seems to result in great hair -
I do think that high metabolism consistently/low gut serotonin naturally results in better healthier forward growth - so the mandible comes out more forward and in healthier people it doesn't occlude as much on the STA - I'll link to the video down below - he does a really great exercise which I will timestamp for people to try out to see if it helps but the whole video is worth watching
View: https://www.youtube.com/watch?v=2VF2ARMU-_4&t=798s&ab_channel=BaldingbyBrianDye
Looking further into this, he quotes in his study
"Of the one hundred individuals suffering from hair loss, direct visual, and observation of dental model occlusion demonstrated that ninety-six individuals had Class II dental malocclusion."