My son was diagnosed with Covid twice. Since then, he has been prone to coughing with a lot of phlegm. He would not be able to sleep well at night and has taken many different Western medicines or folk remedies, but they have no significant effect. Until he started drinking “Excellung”, it began to take effect after about two-three times, and now he can sleep very well. I'm really grateful to have found this product, it helps a lot. Thank you.