There is always a chance that adding a chemical to our system can stall or slow down the process of fat loss. Chemicals are acid in the body. When the body becomes acidic, it has to retain water and fat to neutralize the acid. This could be interpreted as a stall on the scale. However, when the body has regained a safe pH, it will release the toxin, or chemical, or emotion, and weight reduction will continue. Use pain relievers if necessary, and remember to not be alarmed if your weight loss is slowed a bit. This too shall pass.