never knew this.. don't combine starch and protein

The Three Commandments of Food Combination

Dr. Pickering lays out three basic commandments of eating that he recommends you not deviate from:

No proteins and starches at the same meal, as they neutralize each other and prevent proper digestion of either food. To ensure proper digestion of each food, wait two hours after eating a starch before eating protein. And wait three hours after eating protein before eating a starch.

No fruits and vegetables at the same meal. Fruits are either a single or double sugar, whereas the starches are a triple sugar. Fruits mechanically break down in your stomach, but chemically, they don’t break down until they reach the third and fourth stage of your digestive system, which are in your small intestine. Starches, again, are broken down in three different stages, starting in your mouth.

According to Dr. Pickering, this is also why it’s crucial to not eat dessert after a meal. When you do, it gets trapped in your stomach with all that other food, where it starts to rot as it’s not being chemically digested there. Therefore, eat fruit 30-60 minutes before dinner. The same applies if you want to eat another piece of fruit. Acidic fruits, such as lemons for example, also do not combine well with starches. Lemon and banana is but one example of a combination that is sure to lead to gastrointestinal upset...

Many people consider tomatoes a fruit, yet it’s commonly added to salad. Dr. Pickering classifies tomatoes as a “fruit-vegetable,” because even though they don’t have the sugar like most fruits, they’re still an acidic fruit-vegetable. As such they’re okay to combine with other vegetables. He suggests the following recipe for an excellent salad:

“Any kind of vegetable that has seed in it; for example summer squash, zucchini, eggplant, cucumbers, bell peppers, and okra—those are all fruit-vegetables. Your tomatoes go well with those. And since lettuce and celery have a neutral effect, as far as the breakdown of food, the celery and the lettuce combine very well with all of that. You can also add avocados.”

“Eat melon alone, or leave it alone, or your stomach will moan.” In short, melons do not digest well with other foods and will frequently cause problems unless consumed by itself.