Absorption of oral progesterone is influenced by vehicle and particle size.

Authors: Hargrove JT, Maxson WS, Wentz AC.

Publication Year: 1989

Citation: Am J Obstet Gynecol 1989;161(4):948-51.

This small sample study shows that significant serum progesterone levels can be achieved by oral administration of progesterone. Efficacy of absorption is improved using micronization in oil formulations.

http://www.ncbi.nlm.nih.gov/pubmed/2801843