i just found this thread and wanted to add my 2 cents. i just recently started using em crystals and have begun to feel tired all the time and sleep more than usual for me (a chronic pain patient). i usually have to take sleeping meds to even sleep at night but have found that, lately, i'm falling asleep without them ... not sleeping as well, though, and sleeping, now, more in the daytime, too. this could be good or bad. i have regular blood tests run and am due for another appt very soon, so it will be interesting to find out if anything has changed.
i would usually use stevia liquid for my food but forgot to buy it on last order, so i ended up buying the packets which have dextrose as a first ingredient (still low carb, tho), but i'm told i can't use that in my diy mixes. however, i see that even tpa (on their own web site) uses sugar and corn syrup in some of their flavors, so i'm not sure what to think. also, previously, i had dissolved the stevia packets in a little water and strained it thru a coffee filter with no ill effect to my cartos.
except for what comes in the e-liquids, and i'm not sure what that is, i don't use "artificial" sweeteners ... preferring to stick to stevia and a little, occasional raw honey (for the nutrients) in my food. it just makes sense to me that inhaling any sweeteners and them going directly to the blood stream could, over time, cause problems or potential problems down the road ... guess i'm willing to take that risk.
the body is a wonderous, self regulating, machine that will sometimes take a lot of abuse before showing it. i, for one, will be looking for better ways of sweetening my liquids. i use cartomizers, and, since they are throw away, i'm not that worried about gunking them. it seems to me that "natural" is better, and stevia is a natural sweetener. as long as i don't use too much regular sugar, corn syrup, honey, etc., i will feel better even mixing a little of these with the stevia. as long as my rather inexpensive cartos last 4-6 days, i'm happy. btw, i haven't used reguar sugar, corn syrup, and honey to sweeten my e-liquids ... yet, but i'm planning using a tiny bit to enhance the flavor of the stevia. i'm a little reluctant, but i'll probably try the raw honey first.
the way i understand sugar and carbs is that they should rate very low on the glycemic index for them to not increase blood sugar. however, real sugar, in small amounts, is preferable to some of the artificial sweeteners out there. also, different types of sugars rate differently on the glycemic index and, then, there is the potential problem of heating and inhaling them. i have no clue about that.
i guess my post is really from both sides of the fence ... just being cautious but wanting the best tasting sweetness in my juices. as each of us is different, i think we do have to go by how we feel. at first, it just seemed so surprising to me that, as i get further and further into vaping, there are so many variables involved that effect flavor (voltage of batts, ohms of attys and cartos, vg/pg, nic) and how i feel ... nothing is written in stone here. if i find that i need to, i'll just switch to vaping a non-sweet tobacco flavor. when i first started vaping, i even used a little (drop or two) concentrated lemon juice added to some tobacco flavors to reduce the sweetness with no bad results ... until i got into vaping deserts, that is!!!
another possible problem could be that a doctor might mistake a symptom of vaping as being caused by something else, so even with all the great results of those whose health has improved with vaping, we are still the guinea pigs.
i never had any of the usual symptoms from smoking ... no cough or breathing problems. since the fire safety code (fsc) and the probable addition of even more additives, i just began to not like the taste of cigarettes (organic tobacco is an entirely different story). i definitely enjoy vaping, tho ... just don't care for all the variables involved. things just don't seem to be as consistant as they were at one time with cigarettes. it's become very time consuming for me. i've noticed, too, that some of the e-liquids are so good that i tend to not want to know what's in them ... others are just terrible (why i decided to diy)! anyway, i've chosen to vape until i choose otherwise.
sorry my post is so long for not giving a definite opinion, but i think the jury is still out for a lot of us. i guess that's my opinion.