how do you reduce breakage/shedding other than trimming?

well if your hair is breaking the only thing you can do is get a trim, hair grows but you will not retain any length if your hair keeps breaking off, I know it's hard at first but it will pay off. I recommend weekly deep treatments and monthly protein treatments, even if you are protein sensitive do not neglect it. My favorite protein treatment is the SM yucca and plantain anti breakage strengthening mask, its main purpose is to strengthen so don't be discouraged if your hair doesn't feel moisturized, that's the purpose of deep conditioniners. Hope I could be of help