>>471433966It is a complex topic because of individual genetic differences, different levels of musculature and different diets.
Highly processed foods are comparable to sugar, If you want to learn more about it search Glycemic index.
More muscle mass means you can burn more calories as well so if you have never really exercised you will likely get fat at some point in time.
This is an over simplification for educational purposes
Calories in < Calories used = Weight loss
Calories in > Calories used = Weight gain
Best tips to lose weight are do compound exercises (Use lots of muscle groups rather than focus on one).
Cut sugar in particular sugar in liquid.
Get adequate sleep (Sleep is when your body repairs and replenishes).
Focus on long term fitness goals rather than short term because cardio for example can immediately use more calories than resistance training but over a longer time period you will use more with resistance training due to body needing to repair more after keeping metabolism high and the muscle gains allowing you to burn more in the future.