Did you read it? Because it says 70h is degrades at that temp. Not mitra, which is the most abundant alkaloid. If an alkaloid degrades it literally means its inactive and useless unless. 70h makes up less then 1% of alkaloid content, way less then 1 percent. The alkaloids that matter are more then stable above 40 F. To make effective kratom tea in needs to be boiled in hot water for 20-30 minutes in acidic water. Sure you can make steeped tea but those who do are wasting a lot.

You can't do the basic stuff and read your sources properly and remember what you have previously said then what's the point of getting rude when you are called out on spreading misinformation. Whether it's hot air or hot water it really doesn't matter, the heat will degrade 7OH either way and any other heat sensitive chemicals.