I usually get a lot of foaming from products containing coco betaine, even if they are labeled low-lather. I tend to add a lot of water to my hair during the washing/cowashing process to make sure the product is evenly distributed, and that usually = lots of lather. (My hair is very porous, for what it's worth).
2c, fine, extremely dense, color-treated, high porosity. Medium length (longest layer just grazes my shoulders).
mod-CG since 10/12