Can I eat light dishes like steamed fish the day before the physical examination?

You can eat light vegetables such as steamed fish the day before the physical examination, but it is important to control the amount consumed and avoid adding too much seasoning. Steamed fish is a low-fat and high protein food that does not significantly affect the results of routine tests such as blood count and liver function. The core principle of diet before physical examination is to avoid high-fat, high sugar, high salt, and stimulating foods. Steamed fish, as a high-quality protein source for light cooking, has a lower fat content than braised or fried methods, and will not cause abnormal blood lipid test results. Although the protein in fish meat may slightly affect the urea nitrogen index, normal consumption does not significantly interfere with renal function assessment. Attention should be paid to avoiding the use of high sodium seasonings such as soy sauce and Douban sauce to prevent excessive sodium intake from interfering with electrolyte detection. It is also recommended that dinner time be no later than 20:00 to allow sufficient digestion time. If the physical examination includes gastroscopy or items that require strict fasting, complete fasting for 8-12 hours is required. Some special examinations, such as urinary catecholamine testing, require a 3-day restriction on the intake of casein foods. At this time, consumption of green skinned red meat fish should be avoided. For people with seafood allergies, even light dishes should be prohibited from consumption to prevent triggering allergic reactions and interfering with testing. 24 hours before the physical examination, in addition to maintaining a light diet, one should also avoid drinking alcohol, vigorous exercise, and staying up late. It is recommended to choose steamed white meat fish such as sea bass and cod, with a single consumption limit of 100-150 grams, preferably paired with blanched vegetables. On the morning of the day of the examination, it is necessary to strictly fast and drink a small amount of water, but not exceeding 200 milliliters. If there are dietary restrictions for specific examination items, the requirements should be confirmed with the medical examination institution in advance.