According to Franchomme & Pénöel (1990), clary sage oil is estrogen-like, due to its content of sclareol, which is said to be structurally similar to human estrogens. The sclareol content of clary sage oil is given as 1.6-7.0%. In gas chromatographic analyses of clary sage oil, a sclareol content of 0.1-0.4% is typical. However sclareol concentrations tend to be underestimated due to the very low volatility of the molecule, so 1.6-7.0% is probably reasonable. Clary sage absolute is a solid material, and contains about 70% sclareol, which is also solid.
Some of the more common Internet comments about the hormonal effects […]