What is the three mix principle of food?

There is no widely recognized "three mix principle of food." It's likely you're thinking of a concept related to food combining or dietary principles that emphasize the combination of different food types.

Here are some possibilities:

* Food Combining: This concept suggests that certain food combinations are easier to digest than others. It often emphasizes avoiding combining protein with carbohydrates in a single meal, and promotes separate meals for protein, carbohydrates, and fats. While there is some evidence that some food combinations might cause digestive discomfort, there's no scientific consensus on the effectiveness of food combining for weight loss or other health benefits.

* Macro-nutrient Balance: A balanced diet emphasizes consuming adequate amounts of protein, carbohydrates, and fats. This is important for overall health and well-being, as each macronutrient plays a unique role in the body.

* Dietary Guidelines: Dietary guidelines, such as those provided by the US Department of Agriculture (USDA), emphasize the importance of variety in your diet, including fruits, vegetables, whole grains, lean protein sources, and dairy.

It's important to note that there is no one-size-fits-all approach to nutrition. The best way to determine what works best for you is to talk to a registered dietitian or other qualified healthcare professional.

If you can provide more context about where you heard the term "three mix principle of food," it might be possible to identify the specific concept you're looking for.