i think the frothy/foamy urine is due to excess ammonia/bad metabolite's from pathogens/candida protein utilization.. I've gotten frothy urine from eating excess protein/protien shakes. What's interesting is that if I take undecenoic acid while eating excess protein I notice the frothy ,bubbly urine is not nearly as bad. So i think ammonia production is worst when candida is in its fungal form. I don't notice any frothy urine if i do a meal that is strictly carbs.