Safeline Keto: monoester raises the level of one of the two primary ketones our bodies make naturally. wanted to study the effects of a diester, a molecule designed to elevate two different types of ketone bodies at once. But after more than a year of trying, who does not synthesize new chemical compounds himself, couldn’t find an affordable way to make the powerful molecule that he would later test on his rat. “Literally, I would be on my phone all day calling people, trying to make this happen,” he says.