Zero contains vitamin c and 5 electrolytes including sodium magnesium and potassium vitamin c in zero supports a healthy immune system protects the cells from oxidative stress and contributes to the reduction of tiredness and fatigue magnesium in zero contributes to electrolyte balance reduces tiredness and fatigue whilst supporting muscle protein synthesis simply drop a tab into your re usable sports bottle bottle not included and watch it rapidly dissolve the 20 tab tube makes up