A food Grade essential oil means it has been tested and cleared as pure enough to ingest – i.e. that means safety and genuine purity.
This does not mean you have to ingest the oils yourself. But if something isn’t proven clean or pure enough to ingest, you’d have to question whether it’s truly safe to put on your skin, or to inhale. Topical and aromatic usage are the 2 pathways that take the oil immediately to your bloodstream. Hence, food grade oils are best.
doTERRA oils are approved as Food Grade in the US by the FDA and also in Australia by the FSANZ.