for the normal function of the immune system* ,5% withanolides, key \'actives\', guaranteed ,1-a-day formula for less than 22p/day ,veggie/vegan friendly formula and gmo free nature\'s best ashwagandha combines the important properties found in the herb together with added vitamin c and zinc, for the reduction in tiredness and fatigue and additional immune support.the active compounds called withanolides are included at their optimum level, 5% (15mg) per capsule, which is consistent with published studies and a level much higher than many are claiming for their daily dose.nature\'s best aswagandha can safely be taken alongside any nature\'s best multi and it makes the perfect partner when taken alongside popular nutrients such as magnesium, vitamin d and theanine.we use a full spectrum root only extract since this has been the focus over thousands of years of traditional use and is consistent with published studies. the raw material undergoes a sophisticated screening process prior to manufacturing (in line with all our herbs), to ensure that the material meets our strictest quality standards. sadly, this is not true of all ashwagandha supplements, where roots are often mixed with aerial parts (for which the traditional indication was as a topical application) and other plant parts. many of these products do not meet their label claim and in some cases, they contain high levels of contaminants.ashwagandha a revered herb of the indian ayurvedic system of medicine, and we recommend searching online for further information.did you know?the herb is sometimes referred to as \'indian ginseng\', being thought to possess similar adaptogenic properties.*from vitamin c and zinc