ReBoost Tablets: Zinc +10 = Maximum Cold & Flu Relief – Contains over 20 times more of the active ingredient used in Oscillococcinum plus the Zinc of used in Zicam, plus extra 10 natural actives to relieve flu symptoms and cold symptoms that may be caused by the flu virus or cold virus such as cough, fatigue, nausea, headache, sinus headache and congestion.