Butter is the best and most wholesome of our common fats because it is most easily digested, most readily absorbed, and least likely to give rise to this butyric acid fermentation.
"A Handbook of Health"
Woods Hutchinson
He proved this very clearly for the lactic acid and butyric acid fermentations.
"Makers of Modern Medicine"
James J. Walsh
The flavor of butter is due to the presence of five or ten per cent of butyric and other acids of the same series.
"An Introduction to Chemical Science"
R.P. Williams