I don't have the answer but I tought to something...
Since 2008 I don't eat sugar and it improves my Pois by 50%
The other 50% is taurine.
Since 2018, I try to eat better for my stomach gastritis.
But last week, i bought junk food (cakes) and eat a lot of this (a 900g cake eaten in 1 day !).
And I get acne and pimples... After ejaculation, I get acne too.
The scientific argument about sugar and acne is increased insulin and IGF-1 factor.
So, I always said inflammation is a good argument for Pois but we don't have medical data to show it.
I don't think CRP increase with acne so maybe it's not a good test for Pois. Something showing acne might show Pois too. Maybe I'm wrong.