Flaxseed powder contains an element called omega-3. If the brewing temperature is too high, it will lead to the rapid oxidation of this element, thus reducing its nutritional value, so it is not allowed to be brewed with boiling water. Flaxseed contains a lot of vitamin C, and high temperature will destroy its nutrients. Use warm water or boiled water of about 85 degrees to brew flaxseed powder, which can better retain its nutritional value. Although it can be brewed with milk or soybean milk, in order to obtain the best effect, boiling water cannot be used.