Update: I just made a 20ml batch of letro using just pg and vg. The letro was stubborn to dissolve. I mixed only 5ml total pg and vg in a glass dropper with 0.1g of letro powder. I heat that in the microwave until it was nearly boiling, take the hot bottle out using a towel or oven mit, and shook like hell. Letro didn't want to dissolve in that little liquid.
I added another 5ml pg and vg for now total 10ml liquid, heat it til boiling, shook like hell; repeat, repeat. It finally dissolved no flakes or crystals. Then I added the last 10ml pg and vg for a total of 20ml, heat shake, repeat.
I will report back after I make my next batch of anavar using VG and PG only and tell you if it works.
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Another note about my experience in making orals:
The first batch of anavar made using grain alcohol, is of course a very thin and watery like liquid. Anavar is stubborn to stay dissolved. After a few days you will have crystals back in the mix, and you will have to spend 5 or 10 minutes heating and shaking to get the flakes to dissolve.
I think this is partly because the liquid is too thin, not viscous enough.
VG is very thick, like oil or gel. It doesn't "run." So when you make orals using VG, the liquid stays thick. Once you heat and shake till dissolved, the solution should be less likely to crystallize again, you shouldn't get flakes forming (crashing). Because the viscous mix will "stay in a gel," the dissolved particles can't move around the bottle and settle together at the bottom.
So this is another benefit of using just VG or mostly VG and a little PG in your oral liquid.
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Another benefit of using VG:
Grain alcohol is of course flammable. So when my anavar kept crashing, I had to heat that glass dropper bottle up real hot to shake and get the crystals to dissolve.
Well, you'd have to be an idiot to put flammable liquid in the microwave! So you have to heat up a pyrex of water near boiling, put your glass dropper bottle in it, and once the bottle gets hot enough, shake, repeat...
^This is annoying.
With the VG method, you can safely microwave your dropper bottle to shake any crystals out.