"Exact composition" refers to the specific combination or makeup of something, where each part or element is precisely determined and known. Full definition
They both contain the same exact composition of medium - chain fatty acids. (ourpaleolife.com)
I take short breaks now and then to refresh myself and have a track record of always preparing exact compositions based on the given prescription. (coverlettersandresume.com)
The microbiota, which evolved over tens of thousands of years alongside their human hosts, constitutes a complex and diverse community whose exact composition varies from person to person. (scilifelab.se)