The phrase "numerous studies" means that there have been many different research projects or investigations done on a particular topic. Full definition
That's excessive consumption, and it matches the levels in numerous studies showing the dangers of soy. (westonaprice.org)
The risks of raw diets have been acknowledged in numerous studies published in veterinary journals. (dogfoodselector.com)
I've come across numerous studies on the web that say that women are willing to put themselves into the shoes of male or female protagonists, whereas men in general prefer male protagonists. (lindsayburoker.com)