Being a chemist myself I always wanted a solid proof.
Since pure cholesterol has melting point 148-150ºC (well over boiling point of water!) it is clear, something else must be mixed with cholesterol to lower this parameter to 20-30ºC.
I cannot tell the percentage of those mixtures, but I can catch many components of it via mass spectrometry test.
The instrument type - CI Electrospray-TOF High Resolution
Mariner 5158 (Applied Biosystems)