Green Island Naturals capsules are 20mg Dry CBD capsules are made from organic food grade hemp flowers. These high grade flowers are heated, ground, and then encapsulated in the amount of 20mg of CBD per capsule. Capsules are a quick and easy form of dosing, just swallow a capsule and 20mg of CBD relief is on the way. Capsules are processed through the liver, so they can take up to 2 hours to get full effects. 20mg of CBD is an ideal amount for treating stress, anxiety, depression, arthritis, inflammation, insomnia, epilepsy, joint pain and ADHD.