There’s a ton of MCT out there.
A domestic lab is probably using something like this, about half the price of 812:
View attachment 357932
As an agricultural product all sorts of shit can find its way in, from pesticides to heavy metals from the soil. Those are found every once in a while when someone decides to test some (usually food grade) MCT.
Migloyl 812 is an FDA approved injectable excipient used by multinational pharma giants, who retest all ingredients they receive. So every batch is ultra purified and fully analyzed to guarantee it’s not contaminated. It’s pure and completely consistant from batch to batch because it has to be.
There’s always a trace of unsaturated , therefore oxidizable oil found in MCT. in 812 it’s guaranteed to be <0.5%. In others it’s often 2% or more. That can make a big difference because once oxidation starts, it triggers reactions that break down the saturated fat making them oxidize too, in an exponential manner.
The presence of 2% unsaturated fats will degrade MCT 10x faster than .5%.