by Hana Tisserand | May 22, 2017
How big is a drop of essential oil? And how many drops are there in 1ml? When calculating percentages, this is important to know! In three empirical investigations dating from 1999, 2000 and 2016, 1, 25 and 23 different essential oils were assessed using 3 – 7...
by Shane Carper | Tisserand Institute Support | Oct 17, 2025
Diploma in Aromatic Science This is a unique opportunity to get deep insight into Aromatic Science! Five certification courses, four single classes, a detailed essential oil database, four international tutors, a cohort of fellow students with the same dedication as...
by Robert Tisserand | Aug 8, 2025 | Essential Oils, General, Sustainability
“It now appears that the world would have warmed more than it has were it not for the aromatic cocktail of chemicals emitted by plants. It turns out that this can change the weather – and anything that changes the weather day after day and year after year...
by Hana Tisserand | May 17, 2024 | Aromatherapy, Essential Oils
It’s very likely that the first time you experienced essential oils was through inhalation. Our noses are the perfect gateway for the volatile compounds in essential oils, in fact they are designed precisely to engage with the smells of our world. Perhaps this is why...
by Hana Tisserand | Mar 16, 2024 | Essential Oils, Psychology, Research
Some time ago a research paper that looked at the brains of perfumers caught my curiosity. I knew that smelling essential oils could have a profound impact on our psychological wellbeing, and I wanted to see if there are actual, physiological changes that happen in...
by Hana Tisserand | Nov 9, 2022 | General
At some point in your aromatherapy journey, you may come to a conclusion that there may just not be an oil for everything. Just like this person: “The course made me realize that there are so many challenges that face Aromatherapists: suppliers don’t commonly...
