The 5:2 diet is a form of intermittent fasting where individuals eat normally for five days of the week and restrict their calorie intake to about 500-600 calories on two non-consecutive days. This approach allows for flexibility in meal planning while promoting weight loss and potential health benefits. On fasting days, people can choose to consume small meals or snacks, focusing on nutrient-dense foods. The 5:2 diet is popular for its simplicity and ease of adherence, making it an appealing option for those looking to manage their weight without strict daily calorie counting.