The problem is "life is chemistry." So it's challenging to track all the factors at play and identify the pertinent ones and draw a firm conclusion.
If potassium is a means to treat it, you can increase your potassium intake by eating differently without consciously realizing:
A. I increased my potassium intake.
B. My increased potassium levels are the real reason my warts went away -- or at least one of the pertinent factors.
Most dietary studies are "observational" and also self reported. These are both weak means to make any kind of cause-and-effect connection and there's no obvious way to improve on it because it's generally considered unethical to experiment medically on humans by doing extreme things to them and also if you don't lock them down and have absolute control over them, you will not know for certain that they weren't sneaking food not listed or making themselves throw up on purpose or something.
People have all kinds of bizarre behaviors around diet and routinely actively hide it from other people or outright lie. People with eating disorders usually don't tell their social circle they are anorexic or bulimic. They hide that fact.
How do you get people to tell the truth, the whole truth and nothing but the truth about their diet? How do you make sure they report every single candy bar grabbed from a vending machine during a busy workday? How do you ensure they don't fib about something because they feel X is socially unacceptable?
Presumably, if you tried, you would get self-selected volunteers who saw themselves as "eating right" and generally fitting a particular pattern of consumption. You probably wouldn't get a lot of volunteers on "weirdo" diets and if you did, how do you meaningfully compare data for your vegan participant and your carnivore diet participant?
And that's just diet. There are other things in life beyond diet that impact health.
If potassium is a means to treat it, you can increase your potassium intake by eating differently without consciously realizing:
A. I increased my potassium intake.
B. My increased potassium levels are the real reason my warts went away -- or at least one of the pertinent factors.
Most dietary studies are "observational" and also self reported. These are both weak means to make any kind of cause-and-effect connection and there's no obvious way to improve on it because it's generally considered unethical to experiment medically on humans by doing extreme things to them and also if you don't lock them down and have absolute control over them, you will not know for certain that they weren't sneaking food not listed or making themselves throw up on purpose or something.
People have all kinds of bizarre behaviors around diet and routinely actively hide it from other people or outright lie. People with eating disorders usually don't tell their social circle they are anorexic or bulimic. They hide that fact.
How do you get people to tell the truth, the whole truth and nothing but the truth about their diet? How do you make sure they report every single candy bar grabbed from a vending machine during a busy workday? How do you ensure they don't fib about something because they feel X is socially unacceptable?
Presumably, if you tried, you would get self-selected volunteers who saw themselves as "eating right" and generally fitting a particular pattern of consumption. You probably wouldn't get a lot of volunteers on "weirdo" diets and if you did, how do you meaningfully compare data for your vegan participant and your carnivore diet participant?
And that's just diet. There are other things in life beyond diet that impact health.