Imagine i eat 100g of carbs OR 100g of fat.
Carbs: 100g = 400 calories
Fats: 100g = 900 calories
Calorie difference: 500 calories
Mass difference: 0g
I have 3 same questions worded differently:
Mass in mass out isn’t correct. Calories in calories out is. 100g of carbohydrates may weigh the same, but aren’t as good an energy source when broken down in the body which simply put you don’t get a great bang for your buck with them. 100g of fat then is a dense form of energy, when broken down in the body, you can create much more ATP (high energy molecules you use for energy). Now 100g of carbs don’t equate to 100g of added weight as excess energy in the form of carbs is converted to fat in your body, and as fat is a much more efficient form of energy, you create the same calories in a smaller form.Think of it like 100g of wood compared to 100g of petrol in a fire. Both weigh the same but the petrol has much more energy inside it.
Except in atomic fusion or fission mass stays the same.
The energy in food organisms make and use is chemical not atomic. It takes more chemical energy to produce 100g of fat then carbs. So fats have more stored energy and yield more energy when there used as an energy source.
Hard one for sure cico is still just a guide. There’s to many factors for tracking.
Faeces matter Water retained The individuals hormones and thyroid state How fit you areHow healthy metabolism is. (Usually buckled from starving down for weight loss lol)