Food allergies cannot be detected by holding tubes of food samples; standard medical diagnosis relies instead on clinical history, skin prick tests, blood tests, and supervised oral food challenges.
The claim describes an unvalidated, pseudoscientific diagnostic technique often associated with alternative practices like applied kinesiology or energy testing. Validated medical literature consistently defines food allergy diagnosis as requiring clinical history, IgE sensitization testing (skin prick or blood tests), component testing, and oral food challenges. Therefore, the claim is refuted by mainstream medical evidence regarding allergy diagnostics.