The invention relates to a method of isolating {TAIL ~ sterols} in commercial quantities from sterol containing material by subjecting a solution of this material to {HEAD ~ a column chromatographic separation}; for isolating cholesterol from cholesterol containing material, silica gel is preferably used as a column packing and a mixture of, for example, heptane and acetone is preferably used as an eluent 
The invention relates to a method of isolating { TAIL ~ sterols } in commercial quantities from sterol containing material by subjecting a solution of this material to { HEAD ~ a column chromatographic separation } ; for isolating cholesterol from cholesterol containing material , silica gel is preferably used as a column packing and a mixture of , for example , heptane and acetone is preferably used as an eluent
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