Table 1. Patient response to the oral fish collagen challenge test.

Time after OFC (min)	Dose of fish collagen* (g)	Vital sign		Symptoms and signs	Treatment
		SpO2 (%)	BP (mmHg)
Before OFC		98	97/61	No symptoms
0	0.3
1		100	103/57	Discomfort in the pharynx and larynx	Oral antihistamines
15		100	97/64	Pharyngeal obstruction and moderate abdominal pain	Nebulized adrenaline
50		100	106/84	Cold distal limbs	Infusion of normal saline and prednisolone
115		100	103/57	Redness and a wheal around the face
180		98	94/51	All symptoms and signs resolved

OFC, oral food challenge test; SpO₂, percutaneous oxygen saturation; BP, blood pressure.

^*A sample of the fish collagen used in the gummy tablets was provided by the manufacturer; 1 g was added to 3 mL of water and melted in a 500-W microwave for 30 seconds. The patient consumed 1 g of the product, equivalent to 0.3 g of fish collagen.