Step 1 revolves around simple math: You must eat fewer calories than your body is accustomed to in order to drop bodyfat. When a calorie shortfall is created, the body responds by digging into body-fat reserves to make up the difference. And presto, you grow leaner. All other laws aside, this one heads the list every time, no matter what dietary approach you take.
• Body Fat %:  I’ve touched on this in detail in a previous meditation essay. Simply, your body fat levels will dictate what sort of macro composition you should be using. Due to things like insulin resistance, people with higher a body fat % tend to fare better on a lower carb diet. And conversely, someone with a lower body fat % tends to fare better with a carb-focused diet – there are, of course, exceptions. But this holds true for most.
The prevailing formula for a long time on how much fat you’re going to burn was calories in minus calories out, based on your basal metabolic rate (BMR) and exercise efforts, explains strength and performance specialist Joel Seedman, Ph.D., owner of Advanced Human Performance in Atlanta. But with all the different biochemical reactions in the body, hormonal response, and endocrine function, there are an infinite number of factors that can affect how your body is storing and breaking down calories.