Tincture flavor additive sources and concentrations

Hi All,

Anyone have any advice on sources for high quality essential oil extracts like mint - and advice on how much you’ve added to a 30ml tincture?

I’ve ordered samples from a few suppliers and haven’t been thrilled. I’ve experimented with concentrations but curious what others like. I’ve found about 100uL per 30mL is the upper limit that I like.

Thanks –