Thank you for sharing this. All wonderful products we have and familiar with. I was told with the black seed cumin oil if you add honey it powers it up. I had found a study out Australia about Manuka honey when they added it with a antibiotic it powered up the antibiotic. We have the 18 and 27 ratings . The 27 being referred to as medical and the flower taste is strong. You may want to look into it. But the 27 rating is a little pricy. When I get congested I use Osha root, prefer without alcohol but for longer shelf life then with alcohol it is the only option. I use the drops.

https://www.medicinenet.com/osha_root_good_for_and_what_are_the_side_effects/article.htm