There have been many on here on NT who have tried the Carrick protocols over the past years, some at the Carrick Institute. Others at Carrick trained chiro neuros / functional neuros

Very few have found a benefit, even after spending $6000 to $10,000. Carrick can do wonders for some but be aware than it does not help all.

If you can afford the risk, it may be worth a try but I don't think it justifies using credit cards or grocery money to pay for it.