Yellows and Golds are relatively a new blend in recent years. They are also fermented to give the sedating effect yet balanced with energizing strains. Each is a bit different from the other. These strains have been known to have a fantastic effect on mood, anxiety, and stress while still giving a nice energy boost without being overly intense. This kratom seems to go along with what ever you are doing. It is relaxing but if you need to get up and be productive it has the ability to assist in that as well.