Question

What is side effects if you eat food which kept in refrigerator from 3 to 4 days

Answer 1

Personally speaking, my friends*, family and I have long eaten cooked food that has been properly refrigerated for up to 7–10 days. No problems. Responsibly speaking, I can’t recommend this. You’re welcome to try but don’t blame me if something goes awry. :P

What does the USDA have to say? 3–4 days is the recommended duration for common, refrigerated (not frozen) leftovers according to this food safety fact sheet.

The cold storage chart in the fact sheet contains comprehensive information for a variety of foods. I’ll paste it below in case the link stops working some day: