If you mail these people your hair, they'll check its vibes for vitamin deficiencies.
Amazon is currently selling these $66-$212 "5strands Hair Analysis Kits" right alongside legitimate stuff like 23andme kits and drug tests - they're currently the first result for "vitamin deficiency test".
There is no indication within the product description that these kits are providing a vibes-based service, not a medical one.
They also do this for dogs, obviously; if you pay an extra $600 on top of the cost of the kit ($66-$212), a homeopath will even write up a "case study" about your dog's vibes:
While such documents may have little use in medical contexts, I expect them to be valuable in court.

















