You mean with all the extra money parents have lying around?
I am currently on immuotherapy for seasonal allergies. the cost to me OUT OF POCKET (after insurance pays their part) is $150/month.
I was going to do the clinical STUDY at University of Missouri for my food allergies - but you have to completely avoid ALL exposure for 3 months before the study and then for 18 months DURING the study. If you have ANY exposure at all - even a tiny bit then you run a higher than normal participation chance of not being de-sensitized.
Plus - for the drops they are very complex. You have 4 vials of liquid. You go from 1 drop to 2 drops to 3 drops each vial - in 7 day increments.
You have to not get the drops so they hit the teeth or the tongue. Then you have to hold the liquid under your tongue for 2 minutes. Then swish around for 30 seconds and swallow.
NO eating, drinking, exercise or anything that will increase your heart rate - like pooping (I'm not kidding) or showering for 20 min.
EVEN if you do all that for the food de-sensitization.... there's a pretty high chance that it won't work.
So - until my child was old enough to manage all that - which would be 8-9 at the youngest it's better to just stay away from whatever food you are allergic to (or manage the reactions, if not anaphylactic)
Plus - not all foods are approved by the FDA to be included.
It's not as easy as just saying "do it".