Plant sterols occur naturally in food and are similar in structure to cholesterol, the HDL fat that is abundant in animal sourced fats. But what is not generally known is that the body produces its own cholesterol which is secreted into the digestive system in the form of bile to aid the digestive process.
Plant sterols are useful because they block cholesterol from being re-absorbed from the gut into the bloodstream, and any cholesterol not absorbed is simply excreted. This is why diets high in plant sterols can help to control blood cholesterol levels, and why plant sterols are now added to some specialist margarines. Although plant sterols are naturally present in vegetable oils and grains, modern diets tend to be low in these important nutrients, and so it may be difficult to always achieve optimum levels from diet alone.
Each Nature’s Best plant sterol tablet contains 800mg of free plant sterols, with high levels of beta-sitosterols. We quote the level of pure plant sterols, not the compound weight declared by some companies that may be only 50% sterols. This can make a useful contribution to our daily intake, without any unnecessary additional calories.
May help to reduce the absorption of cholesterol
A highly researched mode of action
Useful contribution to your daily intake
A level of plant sterols that can make a difference
After saponification, the lipid extract, called “unsaponifiables”, may contain other lipids besides sterols including hydrocarbons, carotenoids, tocopherols, free fatty acids, and other triterpenes. Many researchers proceed with derivatization and GC analysis without further sample cleanup and do not have problems with interference by these compounds. This is usually acceptable for the unsaponifiables fraction of a refined fat or oil sample. However, in some samples, such as crude oils, it may be necessary to further purify the sterol fraction from polar unsaponifiable lipids. Silica, C18, and aminopropyl SPE cartridges have all been used for this purpose. Phillips and co-workers  used aminopropyl SPE columns to separate sterols and stanols from serum unsaponifiable lipids, using chloroform: isopropanol for elution. Toivo and co-workers  demonstrated that equal yields were obtained using either C18 or silica SPE columns and eluting the sterol fraction from either column with 5% methanol in chloroform or 1% isopropanol in hexane, respectively.