Hi,
I’d like to create an O/W lotion incorporating the actives 5% niacinamide and 3% ascorbyl tetraisopalmitate. The final pH I’ll aim for is 5.5 (to allow for some drift as below 6 is recommended for Ascorbyl tetraisopalmitate). Can you think of any incompatibility issues between these 2 ingredients? Will the niacinamide be stable at this pH (I’ve read it’s best stability is pH6).
thanks!
Comments
Sorry, didn't read your question sooner, I was traveling (not a lot of WiFi around).
The formulation did indeed seem stable, no discolorations, pH drift etc.