Dr. Paul Straub presented a paper that showed abdominal fat generates 10x more dht than those without any abdominal fat. So yes, there is absolutely a connection between balding and being fat. However, you do have to have DHT sensitivity. You can weigh 600 lbs and generate all of the DHT you can, but still not lose any hair if you don't have the sensitivity to that DHT.
"Summary: Dr. Straub's second speech focused on why so many overweight men are balding. Most of us have heard of the stereotype of the "fat, bald guy" like Danny Devito. So why is that so many fat men are also bald? Is it coincidence or is it chemistry? Interestingly, scientific evidence has now shown us that body type does play a significant role in the balding process. Most educated hair loss patients know that the enzyme 5 alpha reductase converts Testosterone into DHT which has been shown to be a major contributing factor towards hair loss. However, recent research has shown that excessive abdominal fat produces 10 times as much DHT as a healthy, lean body.
Furthermore, research shows us that abdominal fat is unique. Low abdominal fat equals low circulating dihydrotestosterone while excessive abdominal fat equals high a level of circulating dihydrotestosterone. No other fat on the body has been shown to do this! We must ask the questions: Can we control hair loss through abdominal fat reduction strategies like weight loss and liposuction? The three key factors we've identified as affecting hair loss are: heredity, aging, and abdominal obesity. Heredity and aging cannot be controlled, but body fat can and each hair loss sufferer must work hard to lose any additional abdominal fat to slow down his hair loss.
Dr. Straub speculated that a possible triad exists between abdominal obesity , crown balding, and coronary heart disease.
My hair loss started five years before my older brothers. I was significantly overweight in my early twenties while he had very little body fat. I began to wonder if the excessive abdominal fat had triggered my hair loss to start earlier than it might normally have. Dr. Straub's presentation allowed me to consider this possibility. I can't turn back time, but I can encourage others to ensure they stay fit and lean to reduce circulating DHT in their bodies."