1. Efficacy and functions of tartary buckwheat tea Tartary buckwheat tea is a very healthy drink with many functions and effects. First of all, tartary buckwheat tea can lower blood sugar and is very beneficial for diabetics. Secondly, tartary buckwheat tea can also help with weight loss, detoxification and beauty. In addition, tartary buckwheat tea can also improve sleep quality and relieve anxiety and depression. 2. The benefits of pregnant women drinking tartary buckwheat tea. Pregnant women also have many benefits of drinking tartary buckwheat tea.