Throat hit in my recipe

I made a mix and i noticed its a bit harsh there’s a throat hit … its 2 weeks steeped and i tried w/o nic so which flavor could cause it?

3% Strawberry Ripe (TFA)
2% Sweet Strawberry (CAP)
0.5% Super Sweet (CAP)
2% Vanilla Bean Ice Cream (tfa)
3% Vanilla Swirl (TPA)
1% Vanillin 10% (TPA)
1% Vienna Cream (FA)

Some people get a peppery taste from Vanilla Bean Ice Cream. That could be what you’re getting.

I agree, I would say it lies between the vanilla bean ice cream and the vanillin (which adds a oak aged taste).