A previous poster is correct. After reading this thread, I picked up the Curly Girl book and reread some parts, specifically noticing that she mentions you can use a conditioner to cowash OR use a sulfate/cone free cleanser. So those that are switching to a low poo are still curly girl! After experimenting I have noticed that I too have more strands of hair falling out on the days I cowash, plus it makes my hair limp, so I will be switching to low poo for a while too.
Does anyone have any US based sulfate/silicone free shampoos they enjoy? Especially ones with protein!