IS THERE A CARB AMOUNT YOU SHOULD “NEVER” GO BELOW?

According to The Essentials of Sport & Exercise Nutrition, there is no “correct” amount of carbohydrates that is the same for everyone, all the time.  Carbohydrate intake depends on:

How big or small someone is

How much lean mass or body fat they have

How active they are

How intense, long-lasting, and/or frequent the activity is

How old they are & what stage of life they’re in

Intake levels of other macros

Genetics

What foods like like, tolerate, and prefer to eat

What they want to do

A small percentage of people function best with more carbs than average, another small percentage functions best with less than average, and most people fall somewhere in the middle and function best with a moderate portion of carbohydrates.  As far as looking for a number to never go below, research shows that our brains need about 130g of glucose a day (glucose is what carbs are broken into).