|>>|| No. 15424
Not the other poster, but I'd argue that it can be worth personally investigating something anecdotal, even if it hasn't been proved scientifically yet (if the potential benefits outweigh the risks).
For example, if you're interested in fitness you're often wading through medical studies that aren't perfectly representative of a certain phenomena or the effect you're trying to achieve (e.g. they've been conducted on rats or on people in very specific physical states), but you can still experiment with principles derived from it just to see if it works for you. A controlled study would be nice, yes, but the worst thing that can happen for that poster is that they go outside a bit more and learn to moderate their own exposure to allergens.
Maybe you're right to be skeptical, especially with the amount of false information published about health in mass media which usually takes some study wildly out of context, but I'm not sure it's necessary here.