acidagingalzheimerbiologicbodybraincarbscardiometaboliccardiovasculardiabetesdiseasefatfattyflexibilityglycemicindexinflammationinsulinintakeldllevelslifestylelightliverloadlongevitymarkmassmedicinemetabolicmindmodernmoodmortalitymusclenaturalnatureomegaoptimalproteinrelationshipresistancerestrictionrisksaturatedsodiumtime