Hi C.,
Sensa says it is salt free and sugar free however it has tricalcium phosphate which is a salt and maltodextrin which is a sugar. It also contains silica. YUCK!
I really don't know how this product would cause you to lose weight except for the fact that silica is not water soluble. The only way I have ever seen successful weight loss is through GOOD nutrition. Some people think they eat well but they either don't or their body does not absorb the nutrition that they are eating. My husband was extremely big and had dieted and dieted and always lost weight and then gained it back with a vengence. The last time he pannicked about his weight (5 years ago) he wanted to go on another diet. I told him no and we were simply going to figure out how to get him healthy. I put him on an absorbable (it has to be absorbable) multivitamin/mineral complex. He didn't change his eating habits or his activity level and he had dropped 60 pounds in 6 months. When he felt light enough to run (he ran track in college) he started running and lost 50 more pounds. He has kept it off.....
His best friend was amazed and tried the vitamin that my husband used and lost 50 pounds. My sister in law dropped 15 and another friend of mine (too skinny) trusted me when I told her good nutrition would balance her weight and she gained 10 pounds. There are ways to lose weight fast but I have never seen anyone keep the weight off. Be careful of these "new" discoveries. There is never a quick fix.
Hope this helps! God bless,
M.