Here’s the scoop on soy from Zen Habits:
It’s one of those things that has spread on the Internet and unbelievably, has become accepted truth to many people: that soy is unhealthy, even dangerous.
I mention (to otherwise smart and informed people) that I drink soymilk sometimes, and a look of pity comes over their faces. ‘This guy doesn’t know the dangers of soy, and might get cancer, or worse … man boobs,’ they’re thinking.
Just about every fitness expert I read — people I respect and trust — says that soy is bad for you, from Tim Ferriss to the primal/paleo folk. I absolutely respect most of these guys and otherwise think their work on fitness-related matters is great. And yet, when I look for their sources on soy, often they don’t exist, and when they do, I can always trace them back to one place.
The Weston A. Price Foundation.
Seriously. I’ve never seen anyone cite a single peer-reviewed study that shows that soy is unhealthy. The only sources are the Weston A. Price Foundation, or other articles that use the Weston A. Price Foundation as a source (read more).
Here’s the thing: the Weston A. Price Foundation (WAPF) have been on a vendetta against soy (and on a campaign for meat and raw milk) for a couple decades now, and they have no solid evidence to back up their vendetta. They have lots of quasi-scientific evidence, lots of reasonable-sounding arguments, but if you look for solid proof, you won’t find any.