For several years now all of my soaps have been with some combination of lard and RBO as the two main ingredients. We love the soap on our skins and neither of us had problems using the soaps on our hair. When her implant got infected after her brain surgery I immediately thought it had to be the soap, but didn't think about changing the formula. Sometimes you can't see the forest due to the trees.Formulating a lye based shampoo bar can take a long time. Coconut oil can be very irritating - palm kernel oil and babassu oil also have cleansing attributes and are less irritating. I found many of the recipes online were not good. Dried out my hair and didn’t help much and the vinegar rinse made things worse. I kept making different changes to increase the benefits to my hair.
I went on the quest of finding a syndet that did not affect the implant area. I did find a gift soap in my stash that did not contain lard or RBO so she is going to use that for a few shampoos. I have my fingers crossed on this as it is so much easier to try to formulate soap than deal with all the chemicals that are hard to pronounce, and that I need a dictionary in order to figure out what they add to the recipe.
She used it yesterday for the first time and said it left her hair kind of gummy...which is the usual if you are not used to using soap on your hair...but that it would take 4-6 shampoos to see if it gets irritated. So wish me luck. I really do want to be done with the syndet bars.