1. We use Costco Kirkland Brand E.V.O.O. Toscano as shown in Video. 2. See list of 10 https://www.nutritionadvance.com/best-real-extra-virgin-olive-oil-brands/ 3. Here's an extensive list of the brands with certification of testing. https://www.aboutoliveoil.org/certified-olive-oil-list 4. Check out the capsules mentioned http://bit.ly/3aZDgM9 Each capsule of Olive Essentials has as much hydroxytyrosol as a liter of extra virgin olive oil, to support your overall well-being and healthy heart, as well as to help keep a healthy immune system in top shape! Two big benefits!