Blood serum concentrations are much lowerâonly about 0.4% of the body's potassium is found in blood serum. As noted above, hypokalemia can be caused by the sudden uptake of potassium ions from the bloodstream by muscle or other organs or by an overall depletion of the body's potassium.
Early symptoms of the flu may include conditions such as excessive or sudden fatigue or body aches and chills, according to Healthline. While fatigue can be an early symptom of a cold, in people who have the flu, the fatigue is much worse.
Common signs and symptoms of the flu include fever, aching muscles, chills and sweats, headache, dry cough, fatigue and weakness and nasal congestion. These are symptoms that are not typical of food poisoning because the flu is a respiratory disease, and not a stomach or intestinal disease.