The GGBN Data Portal provides an easy way to explore and request samples worldwide. In order to do so you need to login/request an account. The account will be validated manually.
Above the results you'll see the note to login/request account
Once logged in you'll see different icons in the right column (x = blocked for loaning, + = can be loaned). By clicking on the plus the sample will be added to your request
Example request basket for samples requested from two different institutions. In case it is listed under CITED you'll see a note in red