You need to consume less calories than you burn if you want to lose weight.

The food standard and old-school diet plan recommends that you consume 500 calories less than your average daily energy consumption to lose one pound each week because one pound contains 3,500 calories. However the exact amount of calories required for weight loss varies by person, and the deficit of 500 calories is only a benchmark.
Women should not consume less than 1,200 calories a day and men should not consume less than 1,500 calories a day. However you should consult your dietitian or physician to decide precisely how much you should eat.
While weight loss is mostly a game of numbers, for your general health, the quality of what you eat while shedding pounds is significant. You can lose weight at the cost of your health if you consume "junk" but also eat less calories. Popular concerns include fatigue, problems with the skin, and hormonal imbalances. So it's fair to assume that for all diets and health goals, eating high-quality, healthy food should go.
Since losing pounds, the introduction of nutrient-dense foods in your diet also points back to maintaining a healthy weight. Food isn't good or bad, but your diet and your wellbeing will make a difference in nutritional value. Brightly colored fruit and vegetables, fiber-rich grain foods, lean meats, and low-fat dairy products are included in a nutrient-rich diet.
You need to consume more calories than you lose if you want to create lean muscle mass.
Currently, under-eating is the number one error some of his muscle-building customers make. You need to calculate your overall daily calorie consumption (TDEE) — the amount of calories your body burns every day — and consult your doctor to determine how many calories you can eat. You need to eat more than your TDEE for muscle gain.
For optimal muscle development, a recent study found that you should strive for protein and carb intake four to six hours after workout. However, nutrient timing is not as critical as your overall intake of healthy protein that is minimally processed for the day. You're on the right track for muscle-building if you eat more calories, get enough protein, and have both a pre and post-workout snack. But the process of actually building muscles doesn't always happen in the kitchen.
You need to eat a range of foods if you want to build up your stamina.
Ultimately, for either your workout or your physique goal, you have to fuel your body. Be sure to check with your doctor first before attempting a new diet or exercise regiment. Then continue to break the marathon record comfortably, build lean muscle mass, or shed pounds.