NUTRICLEAN ADVANCED FIBER POWDER ( SHOP NOW ) Am currently testing this product out at my own risk. Upon mixing the powder into water, I was hoping to see fiber particles but it is too minimal. Flavor wise acceptable. Consumption timing recommended was morning, followed by half a lemon juice in warm water. That makes me figure science out. Over at NCBI research and test done: Lemon juice , but not tea, reduces the glycemic response to bread in healthy volunteers: a randomized crossover trial Results: Tea had no effect on the glycemic response. Lemon juice significantly lowered the mean blood glucose concentration peak by 30% (p < 0.01) and delayed it more than 35 min (78 vs. 41 min with water, p < 0.0001). None of the tested beverages had an effect on ad libitum energy intake. Anyway, I did not use lemon juice, neither did I drink it separately. I just add 1 tablespoon of apple cider vinegar into the fiber drink. That's itself should work well. After feel: Needless to say