Reverse Tolerance To GBL?
I've been a moderate GBL user for probably 1-1.5 years now, my tolerance built up from 1.5ml to 2.5ml, then stayed there for ages but then started to creep up slightly again, finally getting to 3ml a couple of times daily which is when I started to get mild withdrawal symptoms (mild anxiety,nausea etc) after a day or so off the stuff, so after I finished that bottle I thought I'd give myself a little break from it.
2 months later, I felt ready to have another go at it so bought my bottle from the same place I always buy from, the packaging, bottle, Data Sheet and smell were all identical to my previous bottles.
I then get my big bottle and fill several smaller bottles with GBL so that I don't have to carry a massive bottle around to house parties, clubs, Grandma's house (that last one was a joke

)
For my first dose, I thought I'd err on the side of caution and started with a 2.5ml dose. Gave it an hour and felt nothing so took a slightly higher dose. Over the next few days I settled on my new enormous dose of 3.75ml!! which then increased *again* up to 4ml!
But after dosing at 3.75-4ml per dose for a few weeks I started to notice that I was G-ing out a lot. So I've reconfigured my starting dose and it is now at a more sociable 2.75ml.
I would have thought my tolerance would have been lowest after the 2 month break and gradually increased rather than decreasing after the few weeks at binge doses.
Is this something that can happen? It seems a bit weird. Is it possible that the supplier (who I always found very credible, fast delivery and excellent prices etc Never given me any reason to doubt them) diluted it a bit and then the liquid that they used to dilute didn't mix properly and the non-GBL layer floated to the top and I was just siphoning it off? And drinking that thinking it was GBL, or is there such thing as getting a reverse tolerance?
It kicks ass BTW, my GBL is lasting loads longer now!