1. According to the public health network, gastrointestinal burden: canned tuna in oil will add more preservatives, which usually leads to excessive intake of intestinal contents, which may cause irritating flatulence and burping, and may also cause nausea or vomiting.

2. Liver dysfunction: If the intake of canned oil tuna is not controlled, long-term consumption will lead to toxin accumulation in the body. When the liver function is slightly uncomfortable, the detoxification function will be affected, which will increase the burden on the liver and cause abnormal liver function.