My 2.5yo son was having bad cough n flu and i put the powder into his drink for 2days, he recovered. I also gave to my husband who coughed and i took myself when i start to feel abit of sore throat coming.. miraculously it worked so i gave to my 72 & 74yo parents they also recovered from their cough n flu after 2 days of taking Lung guard. 👍🏻highly recommended thou expensive but worth it!