Nadinola (contains a bit of sunscreen but surely not enough) and Othine are super old brands from the same company I believe (same lab/company J. Strickland address on boxes).
I remember using Othine on my knees in high school a million years ago.

It does work but relatively slowly. It seems to be better with scrubs, AHA or glycolics (exfoliants) in your regimen as well.
I've added dear old Othine 2 weeks ago (I do it every other night) to my regi of weekly gly peels and F&F Parfait daily.
The synergy seems to be getting my face and neck closer and closer to my body color a bit faster(?). I don't think the Othine is hurting. It's also so cheap that I'm fine slathering it on my forearms too.
I could be wrong but i think that HQ is more of a restoration thing? ...like to use until you're back to normal (spots, shadows, blotches, freckles are faded)...to get rid of excess color?
I don't know if HQ can safely change your base natural color & full-body ongoing?
It does sound kinda toxic to use all over indefinitely but that's just my totally non-expert opinion.