Hello, can mix together. Stirring by hand. It may take some time because
Hyaluronic Acid (Japan). But it may take a long time if stirred by hand. One way to help is to mix all the ingredients together first and refrigerate for 1 day, when it is cold, add
Hyaluronic Acid (Japan) into the formula and keep stirring. the cold will help
Hyaluronic Acid (Japan) dissolved faster and easier