The phrase "acid composition" refers to the types and amounts of different acids present in a substance. It describes the relative proportions of various acids. Full definition
My doctoral thesis committee head complained when I quoted in my thesis the known fatty acid composition of horse blood serum. (wattsupwiththat.com)
It is well established that the amino acid composition of dietary protein can influence the regulation of skeletal muscle protein turnover. (academic.oup.com)
The benefits of coconut oil are mostly about the fat, and refined coconut oil has the same fatty acid composition as virgin coconut oil. (wholenaturallife.com)