I was in a bar sitting at the bar one time, say quarter full, no noticeable music playing. A guy sitting about 5 feet to my right said to the barmaid 'smell that guy' and the barmaid said 'I can't smell anything'. I believe her.
This has happened to me a few times and it is my belief that a sizeable minority of people cannot smell someone with a FMO3 issue due to genetic reasons probably to do with the same enzyme. This may also be true for other enzyme disorders that cause a smell. I'm guessing many people carry the variants for FMO3. Presumably the number carrying mutants is much lower. But you can end up a 'compound heterozygote' where you are carrying certain variants in an order that can cause FMO3 deficiency at times.
On the good side this means that perhaps 5-20% (my estimate) cannot smell you when you smell, so to them you are not odorous. This may not be true for 'severe' genetic FMO3 cases (I don't know). However I guess 'mild' and 'severe' cases even have a bigger desensitivity to the odors than 'carriers'. Personally I believe about 1% of the population could be 'at risk' of FMO3 substrate overload at times.
Something to think about.
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