I was preparing a herbal-based hair serum formula using a 2% penetration enhancer called Laurocapram (Water Soluble type), but I still felt it wasn't absorbing enough. I'm considering adding one of these enhancers:
3. PEG/PPG-14/7 Dimethyl Ether
The question is
1. Which add-on should I add to work with Laurocapram?
2. Can you add more than 1 or all 4?
3. Help recommend the amount % of each type that can be put together to maximize absorption.
4. If wearing many things Will there be any safety side effects?
Please ask for a quick answer.