Henry had a serious weight problem. He was grossly overweight, with a waist measurement
of 54 inches (137 cm).
He ate vast amounts of food, meat, fish, dairy products and lots of wine and beer. He wouldn't stop eating, even when a doctor told him to cut down. He became so fat that he had to be carried everywhere by servants.
The scurvy, caused by vitamin C deficiency, is the only disease that fits Henry's symptoms - ulcerated legs, bad breath, collapsed nose etc.
There was a prejudice at the time that only lower orders ate vegetables. The rich could afford more exiting things like venison. Vegetables grown in England were seen as food for the poor.
Henry was like Robin the Bobbin
Robin the Bobbin, the big-bellied Ben,
He ate more meat than fourscore men;
He ate a cow, he ate a calf,
He ate a butcher and a half,
He ate a church, he ate a steeple,
He ate the priest and all the people!
A cow and a calf,
An ox and a half,
A church and a steeple,
And all the good people,
And yet he complained
That his stomach wasn't full.
It's to refer to the rapacious nature of King Henry VIII in seizing Church estates.