For example, although citronellol makes up 38% of Bulgarian rose oil, it only accounts for 4 3/10% of its scent, and although geraniol makes up another 14% of the same, it only accounts for 8/10ths of one percent of its scent.

Yet damascenone in Bulgarian rose oil makes up only a tiny 14/100ths of one percent, and yet accounts for a whopping 70% of its scent, and ionine only 3/100ths of one percent, and yet accounts for 19 1/5% of its scent.

For example, air-oxidized d-limonene is an allergen, where unoxidized d-limonene is not. (d-limonene was once used by traditonal medicine to solubilize gallstones, whereas l-limonene remains today’s limonene of choice for holistic practitioners. Use orange oil and lemon oil to produce dl-limonene.)

An essential oil’s therapeutic value lies in its acidic anabolic components (ant-fatty acids such as the glycerol and fatty alcohol components of esters), not in its alkaline catabolic ones (anti-sterols).