This document discusses thiaminase, an enzyme that breaks down vitamin B1. It found thiaminase activity levels up to 157 units per gram in certain fish, with some freshwater fish and shellfish posing the highest risk of causing thiaminase-induced vitamin B1 deficiency. Consuming as little as 1 gram of these high-risk foods could result in vitamin B1 deficiency within 24 hours.

2. B1
B1
(Thiaminase)

5. B1
1 15–50
157
1
24
1 73.90
ETAK Low risk 34.40 Deficiency 3.20
TPPE Low risk 21.00 Deficiency 52.90
1 1
93.34
63.70)
15.30)
63.70)
1