I think if you use proper lab techniques and go about making lotion in a professional responsible manner you will have a safe product. I have several lotions here that are over a year old and are just fine. The thing is I don't cut corners. I have to work myself up to make lotion. I hate making them because of all the work I put into it. Unfortunately I have to use my kitchen to make them. I scrub ever surface including the walls before I make them. Lots of work but I enjoy knowing that I have a quality product when I am finished. I wish I could afford the preservative testing but I can't.