I purchased this a few years ago after research saying it was great for allergies and asthma. I have mild asthma and it was wonderful at helping that so I didn't have to take singulair and Symbicort which didn't work great and had side effects. This worked great! Although it came with getting my acid reflux/Heartburn again. I have had that in the past and sucked to get it back again. But I had also neck issues and Quercetin worked wonders for that pain for sure. I didn't have to take any pain relievers so I stuck it out. But just couldn't deal with the reflux anymore cuz taking acv didn't help. So I stopped. The pain came back but I did other things by that time to control it. Got my acid reflux on track and had to heal my esophagus so I did the acid reflux diet and took Zantac temporarily (before the recall). But recently I've had a lot of migraines because of allergies (the weather) and my neck issues. So I decided to try this once again. I took two this time to start out because last time I think I took too much so I ended up with acid reflux. But I got bad Heartburn. But then I just took one which is 400mg and jackpot! That worked. No reflux(well maybe a tad but goes away and I can handle it with Pancreatin or enzymes). And it helped my asthma in conjunction with Mullien leaf supplement. It also helped my allergies with taking allegra and a homeopathic along side. And I can add it still helped my pain. Ever since taking this again I havnt had a migraine! Extra benefits are that it seems to help my overall digestion as well and helps my overactive bladder, which is a plus. So take one and give it a try if you think it would work for you. ðŸ˜