There's 3 different types of Miglyol, the 810, 812 and 840. The first 2 are kinda safe since they're derived from MCT oil and caprylic acid.
The 840 most likely can increase inflamation since it's a propylene glycol diester. Propylene glycol can be inflammatory and cause an allergic response to many people. It's been used mostly in cosmetics.. Many of us have used it in topical minoxidil, if you have that itching and discomfort it's from the PG.
That's why some companies like Minoxidil Max have a complete line up with PG and one without it. It's not as shitty as guaicol but there's no reason to chose a brew in Miglyol instead of MCT or even better organic carrier oils like sesame or GSO. The only advantage of Miglyol is its extremely low dynamic viscocity rating, making it suitable for brewing high concentration per ml.
I believe with a hs CRP test and a CBC you can see if it's toxic for you or not. I would avoid it though since there's plenty of UGL that brew in better oils.