"Research has concluded" is correct and usable in written English.
This phrase can be used to indicate that research or investigation has been completed and a result or answer has been reached. Example: "Research has concluded that the average lifespan of an elephant is about 70 years."
"But what the research has concluded is that they don't.
But this isn't because scientific research has concluded that unborn children have been damaged by sushi.
But additional research has concluded that she has a probable case of anthrax, health officials said.
Earlier research has concluded that extended breastfeeding improves a child's resistance to allergens.
Homeopathy is not effective for treating any health condition, Australia's top body for medical research has concluded, after undertaking an extensive review of existing studies.
The National Sids Council of Australia has said that "rigorously conducted, scientifically based research has concluded that there is no evidence to support the link between wrapping mattresses and the prevention of Sids".
Some earlier research had concluded that even brief severe droughts might tip the Amazon toward becoming savanna.
"We question this author's continued attempts to reframe historical occurrences to conveniently align with the currently trending anti-sugar narrative, particularly when the last several decades of research have concluded that sugar does not have a unique role in heart disease," the Sugar Association said.
Reviews of the research have concluded that women's preferences should be key determinants of management when one option is not medically superior to another.
The primary focus of our study was to examine the policy and practice impacts of research that occur in the 'real world' after the research had concluded.
In summary, none of the recent research or reviews of research have concluded that permissible RF exposure levels from mobile phones and their base stations lead to adverse health consequences.
