What are the moisturizing ingredients?
You can add special oils to soap like shea butter, vit E., jojoba, etc. but the main thing that is moisturizing about homemade soap (made properly) is that is has all the natural glycerin left in (which comes from the original fats and oils… coconut, palm, olive, tallow, etc.). Glycerin is a by-product of soapmaking and in commercial products, they usually draw most of it out. This is why commercial soaps are more drying to the skin than the natural homemade kind. The average bar of homemade soap is approximately 75% soap compound and 25% glycerin.