Nano creams and lotions can be problematic because of the “stray” oil in the system. Basically, there is a process called Ostwald Ripening that can take place when you have a product that is very polydisperse (large range of particlee sizes). In lotions, if you incorporate nano, you will have many nano-sized droplets mixed in with micron-sized droplets of the lotion oils. Because of differences in Laplace Pressure between the droplets, the large droplets will have a tendency to “suck up” the nano droplets, and after a few weeks on the shelf you no longer have a nano product. Someone may have figured out how to solve this issue, but it can be tricky… We do have some truly nano topical formulations but they are not lotions or creams.
Also, most of the companies repping 10% active nano have a garbage product in terms of particle size. If you want, message me and we will size it for you.
-Josh