I saw some documentary and anorexia has a lot to do with serotonin levels in the brains. Many anorexics have it at higher levels than normal, and eating releases serotonin, so instead of feeling happy after eating like msot people, they feel anxious after they eat. When they don't eat, the serotonin level drops to a more comfortable place.
There's a lot of evidence suggesting this is genetic, but I think mothers may also pass down their food hang-ups in raising their children. In every woman I've known well who was/is anorexic, I've noticed that her mother was militant about watching her own weight.
An ESFP friend of mine who used to be anorexic and still struggles with food issues used to describe it that way - eating made her extremely anxious. It had less to do with being thin than keeping her anxiety in check and having a certain amount of control. She was also OCD, and supposedly many anorexics are OCD also (from the same documentary).
When it comes to men, I've known a few INTPs who had eating disorders.
I could see NF perfectionism leading to an eating disorder also. I don't think you could name a type more prone to it though, especially if it has more to do with stuff like serotonin levels and OCD.
Anorexia is chaning in profile, originally it was seen as a control illness where the young person felt subjected to being controled by parents or grew up in an emotionally volitile household. Hence I think the 1970/80s anorexic was probably a J type
I think this has changed to incorporate many aspects of body dismorphia.
I think the Anorexia and OCD link is the damage caused by lack of fuel (rather than the other way around).... but this is from historic perspective rather than up to date info.
The range of eatting dissorders have tipped the balance so to speak.
High levels of Obesity (probaboly realted to ratio of wadges:cost of food and super markets selling a hue proportion of treat based products), cause a distorting of weight perception, increasing a kids desire to control their weight, thus potentially opening the door to Amorexia or even bullemia.
an SJ at work has some form of anorexia (although not taken to an excess so almost physically healthy).
Body dismorphia is a big driver I'd think.
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Just as a though:
Sever underweaight would lower your life expectancy the most (radically reduces life expectancy)
Followed by obesity (will take off a good few years)
Followed by smoking (will take off a good few years off but less the obesity)
i'd guess high levels of alcohaul would be between obesity and smoking...
People have not got enough stress in their lives/don't struggle enough to ensure they are healthy. Persumably it's true of animal communities too, if there is too much food/lack of struggle they communities become lackluster and fail to thirve.