HI I DIY all my own liquids too, what I do when I'm searching for a particular recipie is look online and litterly hundreds of recipies are posted. I know they are safe because I'm the one making it and I know exactly what I put into it, so not sure what you mean by "safe" if it was unsafe, I wouldn't use it but honestly I've not come across very many UN safe recipies. It would only make since that if your the one mixing it, Your not going to use anything unsafe in the recipie. Common since would say if it called for a unsafe component in the recipe, not to use that recipie. But you can find many wonderful recipies online where you can use a base of your choice. Meaning if you find a recipie just follow the flavor profile and percentage and use YOUR base which would be zero nic and 100% vg. Hope this helps. Best wishes.