Well of course there would be an emphatic 'NO' from me, and
probably not for the reasons you would expect.
I suspect their are a fair amount of New Zealand horse owners
who agree wholeheartedly with me also, having experienced the
benefits for themselves and their horses.
However I understand that the general horse public are sick to
death of having the 'latest and greatest' shoved down their
throats, with claims it will solve all their problems, and not
delivering anything but an empty bank account... It
seems that these days there is a lotion and potion for everything,
all at a cost of course, and many of these things require
unrelenting faith that they just will work. Of course I have an
unfair advantage, I can check and see if they work - double edged
though, as I cant tell you the results!
Anyway the question of allergies has come up, and in a
roundabout way I have actually seen a few horses with sinus issues,
I have been given permission to post these pictures of a horse with
a sinus infection.

And next is one of mine tonight - that doesnt have an
infection.

(and all the rest lined up in the background, wondering what on
earth I was doing!)
There is nothing that Thermal Imaging doesnt show, and I am not
aware of any other diagnostic that can show issues on
bone/ligament/muscle/hoof/tendon/and internal organs if inflamed
all in the one non invasive extremely short time frame. I see
horses all the time that have been Xray'd all over, or scanned or
worse, these other procedures all focus on one area and miss the
rest, and realistically its like throwing a dart in a haystack
knowing where to begin.
There are times where I advise that wont be much
help, allergies is probably a good example, yes I can show an
inflamed sinus or glands, but that doesnt help find what the
allergen is! Also laminitis is another one, yes it shows clearly,
but if its been diagnosed, all you will get is pictures of what you
knew, however I often get asked to confirm the diagnosis. So in my
mind there is nothing gimmiky about this at all, But what do
you think?