This nasal spray is amazing. Recently, I was going back and forth between hot and cold environments and I felt that I was coming down with something bad. Within 12 hours, a scratchy throat, chest congestion and headache set in. I’d just received this nasal spray so I began using it every 4 hours. By the next morning, all symptoms were alleviated and I felt brand new. Usually when those symptoms set in, I’m in for a rough ride with my immune system. However, this nasal spray was a game changer. I was so impressed that I took it on my 3 week missions trip to Africa. I took my usual survival kit, daily supplements and this nasal spray. I conducted an experiment during this trip. Prior to my flight departure, I used the nasal spray spray as directed on the package. Every 4-6 hours of my 26 hour flight I would use the spray. It was cold in NC when we departed. It was even colder in London for our connecting flight. It was hot when we landed in Africa. While in Africa, I used the nasal spray twice a day for the entire trip. When I came in contact with the villagers and I heard someone coughing or sneezing, I’d use the spray again. I used the spray every 4-6 hours on the return flight to America. Not once did I get sick or develop any symptoms that could be attributed to the common cold, flu, Covid, etc. I was impressed because my husband and I usually get sick from the extreme climate changes but not this year! I can now recommend this wonderful nasal spray to my patients and clients because I personally know that it works. This spray is great for daily use as a preventative, when in contact with someone sick, those with suppressed immune systems due to chemo/radiation, anyone who works at a school/daycare/hospital or nursing facility, parents of young children, those who fly frequently or use public transportation, etc. The list goes on and on. People who find it hard to use immune boosting products due to interference with their prescription medications can benefit from this. There shouldn’t be any reactions with most medications. The spray doesn’t burn, sting or cause any irritation. The ingredient list boasts some important herbs that benefit the immune system. As a naturopathic doctor, I can’t believe I didn’t stumble upon this company sooner. I love this product so much that I keep a bottle in my purse, travel first aid kit, mission trip survival kit and one in my car. With once a day usage, a 30 ml bottle lasted me a month. I consider this a worthwhile investment. Let me point out that both my husband and I had reduced allergy symptoms while using this. It is now a part of our daily regimen. I highly recommend this product for everyone and especially children over the age of 10, senior citizens and anyone who needs to boost their immune system. You won’t be disappointed if you’re in reasonably good health. Do yourself a favor and take the dive, make the investment and bless your body!