I've been taking the Blue power and giving them to my four adult sons. They ask for them in their Christmas stockings. I take one a day for insurance,and I've never caught flu or fever since I took it, I give the credit to my boosting immunity. It's really great in this COVID-19 time. I dare not go to hospital or go to drug stores. I recommend this product to so many people that I wish I had stock in the company. Blue power is with me wherever I go!