Effect of a supplementary dietary evening primrose oil mixture on hoof growth, hoof growth rate and hoof lipid fractions in horses: a controlled and blinded trial.
Equine Vet J Suppl. 1998 Sep;(26):58-65. doi: 10.1111/j.2042-3306.1998.tb05123.x.
Equine Vet J Suppl. 1998.
PMID: 9932095
Clinical Trial.