[ellisd]

At least for me, all it took to discover an intolerance to certain yeasts was visiting a tasting room for yeasts (https://www.whitelabs.com/) and sniffing a beer containing the specific type of yeast (Note: all the beers I was tasting were variating just the brewing yeast).

The reaction caused a massive nasal congestion and a runny nose that essentially ended my ability to taste or enjoy further tastings for the day.

I've also seen this reaction occur across very similar beers: Weihenstephaner Hefeweissbier non-organic is totally fine, but the organic one will cause the nasal reaction.