Soja ou não soja?

Como é que estamos em termos de estudos sobre soja e como interpretar uma série destes estudos que dizem que previne o cancro ao passo que outros referem que o promove? Com links para uma série de artigos adicionais e a história da indústria da soja desde 1940:
http://edition.cnn.com/2017/03/07/health/soy-foods-history-cancer-where-do-we-stand-explainer/

Citando:
"There have been numerous conflicting studies on the health benefits of soyHere's a look at the history of soy in America and where experts now stand"Soy foods are good; soy foods are safe; soy foods prevent breast cancer," one expert says [estudo de 2017]"
(...)
""Twenty-five grams a day is a good estimate or a good guideline to follow in trying to incorporate it into what we are eating," she said.

Yet she added that while natural soy food products offer health benefits, processed soy foods provide a different story.

"I think soy milk is one that would be OK, and tofu and tempeh and edamame. Again, those being more on the natural side," Stangland said.

"As we go into a lot of vegan and vegetarian products, like when they use that soy to make a meat patty and it's not just soybeans that are in there but it's also additional soy product to make it into a meat patty, then that's where I would say it's more processed," she said. "Any of the bars and the powders out there that are manipulated are not even giving us the same benefits that we are finding in the research.""

Nota final: A soja na Ásia é maioritariamente consumida fermentada. O que é algo completamente diferente.