I have a different take on sweetners; I have found that the less sweeteners I take in my body, the better my body responds to Primal/Paleo way of eating/life. I have become sensitive to the fruit sugars in the way of I can actually taste how sweet they are with out any additives.
I began to lose weight at a steady pace the month I gave up ALL processed sweeteners and foods. Sweeteners are not natural. I don't care if it came from the farm on your street. If it's in a package, box, or can - if that plant is not shoved in that container = NOT NATURAL. it's processed and your body has to sort through the processed form of ANY sweetener - after having an insulin spike to deal with because of it.
So do yourself a favor - if you NEED that sweetness of something, have the real thing. REAL sugar can be processed by the body easier than any processed form of a plant or man-made derivative of such. Anything you take in your body and the brain recognizes it as sweet it will send a signal to your pancreas telling it - you have just eaten something sweet, release insulin...then 20 minutes later your body is programmed to release even more to combat the actual amount of carbs you just ingested. Which is why diabetics are told to check their insulin twice once before their meal and then 30 minutes into it. So when you ingest something thing that isn't sugar, and the insulin doesn't have glucose to hold onto and process you have a bunch of insulin in your system then your system turns around and says ..... we are hungry all this because the insulin spike, however slight it may be, depletes your bodies blood glucose levels because that's the only "sugar" available.
You can't turn this off, but you can control it by what you ingest.
Give it 30 days. It's not going to be easy. I had to actually sit down and ponder drinking my black coffee.....but I'm really glad I did. (don't get me started on the effects of caffeine and possible insulin response, there are some things in life a girl's gotta have)
I had to go through Anatomy and Physiology and College BIO before I realized that these things were just bombarding my system with absolutley no nutritional value what so ever.
Good Luck to you
Here is some interesting facts on Stevia =
http://en.wikipedia.org/wiki/Stevia
take a look at the extraction technique and what is used... awe hell I'll name them:
Rebaudioside A has the least bitterness of all the steviol glycosides in the stevia plant. To produce rebaudioside A commercially, stevia plants are dried and subjected to a water extraction process. This crude extract contains about 50% rebaudioside A; its various glycoside molecules are separated via crystallization techniques,
typically using ethanol or methanol as solvent. This allows the manufacturer to isolate pure rebaudioside A.[45]
The National Research Council of Canada has patented a process for extracting sweet compounds from stevia by column extraction at temperatures from 0–25 °C, followed by purification by nanofiltration. A microfiltration pretreatment step is used to clarify the extract. Purification is by ultrafiltration followed by nanofiltration
= NATURAL? I think not.