Vitamins，likeminerals，arechemicals.Thereisabsolutelynotdifferenceinthechemicalstructure

ofthenaturevitaminCandthechemicalstructure

ofthesyntheticvitaminC.Also，whilemostsub- stancesareharmlessatverylowlevelofintake，all

substance--eventheelementsthatareessentialtolife--canbedangerousifyouoverdothem.Takewaterforexample.Sixoreightglassesadaywillkeepyourbodyingoodfluidbalance.Butyoucanalsobedrown

init.Somepeoplearguethatindividualsvarygreatly

intheirneedfornutrients，itcannotnecessarilybestatedanygivenamountistoomuch;thatisall

relative.Butsincethereislittlesolidinformationonwhatistheoptimalintakeofanyessentialnutrientinhealthyindividuals，itwouldbeimpossibletogiveguidelinesthattaketheseproportionalneedsintothe

account.Justaswithotherdrugs，therelationto

differentvitamindosagesvaries，withsomepeoplebetterablethanotherstotoleratelargeamounts.Whilewedoknowthatveryspecificallywhatthetoxiclevel