Hydrate - dehydration weakens the immune system as it relies on fluid to flush toxins. In addition, dehydration makes you feel droopy; it's the #1 cause of daytime fatigue. Make sure you drink enough pure, filtered water throughout the day-68 ounces is the rule of thumb, but you should drink more if you feel parched (as that's a clear sign of dehydration). Sleep - sleep deprivation takes its toll on the immune system because your cells regenerate while you rest. To avoid feel