Cosmetics Formulation Development

I would like to ask if there will be a separation from the formula or not. and compatibility of ingredients 1. Ascorbyl Tetraisopalmitate 10% 2. Bakuchiol 1% 3. Squalene 89% and if used with another serum which contains Niacinamide Will there be any problem because I am afraid of interaction between Niacinamide ? Niacinamide and Ascorbyl Tetraisopalmitate Thank you.

Hello Squalene means Squalane or not Squalene is sticky, not suitable for use as a base oil, but Squalane is thin, can be used It is a good base oil

and if used with another serum which contains Niacinamide will there be any problem because I am afraid of interaction between Niacinamide ? Niacinamide and Ascorbyl Tetraisopalmitate

It's okay if you don't mix it. in the same formula The reason is because the reaction time takes time. It doesn't happen immediately. in case of Perfect-C Niacinamide (when compared to ascorbic acid Niacinamide which happens much faster)